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Postado em 19 de dezembro, 2020
The surface of hyaline cartilage is smooth. Dense regular connective tissue contains densely packed collagen fibers that run in the same direction. Unlike cartilage, bone tissue can recover from injuries in a relatively short time. Sources Hole's Essentials of Human Anatomy and Physiology. Protection is another major function of connective tissue, in the form of fibrous capsules and bones that protect delicate organs and, of course, the skeletal system. The most common cell found within connective tissue is the fibroblast. Specialized cells in connective tissue defend the body from microorganisms that enter the body. A common way of classifying the many different types of connective tissue is to subdivide it into three main sub-categories, and further divide those subcategories into specific types of connective tissue. Learn vocabulary, terms, and more with flashcards, games, and other study tools. The surface of hyaline cartilage is smooth. View the University of Michigan Webscope at http://virtualslides.med.umich.edu/Histology/Cardiovascular%20System/081-3_HISTO_40X.svs/view.apml to explore the tissue sample in greater detail. Under the microscope, the cartilage fibers appear as whispy lines arranged in an orderly fashion with chondrocytes spaced throughout. Osteocytes, bone cells, are located within lacunae. Reticular cells produce the reticular fibers that form the network onto which other cells attach. Epithelial Tissue: Epithelial cells are closely packed together. It contains all three types of fibers (collagen, elastin, and reticular) with much ground substance and fibroblasts. Figure 7: Fibrocartilage Elastic cartilage (Figure 8) is very springy and yellow, and is found in the epiglottis, the external ear, and the larynx. Cancellous bone looks like a sponge under the microscope and contains empty spaces between trabeculae, or arches of bone proper. The histology of transverse tissue from long bone shows a typical arrangement of osteocytes in concentric circles around a central canal (Figure 4.12). The amount and structure of each component correlates with the function of the tissue, from the rigid ground substance in bones supporting the body to the inclusion of specialized cells; for example, a phagocytic cell that engulfs pathogens and also rids tissue of cellular debris. Dense regular connective tissue fibers are parallel to each other, enhancing tensile strength and resistance to stretching in the direction of the fiber orientations. One of us! The threadlike fibers labeled e … Under a light microscope, collagen fibers in the connective tissue framework of meat range in diameter from 1 to 12 micrometres (0.001 millimetre = 1 micrometre). Unlike epithelial tissue, which is composed of cells closely packed with little or no extracellular space in between, connective tissue cells are dispersed in a matrix. Blood has two components: cells and fluid matrix (Figure 4.13). Some white blood cells have the ability to cross the endothelial layer that lines blood vessels and enter adjacent tissues. Two major components of the matrix are ground substance and protein fibers. They do not often branch and, when branches are found, they usually diverge at an acute angle. Types of cells that can be viewed under a basic compound microscope include cork cells plant cells and even human cells scraped from the inside of the cheek. Under the light microscope, muscle cells appear striated with many nuclei squeezed along the membranes. http://firstname.lastname@example.org@7.1. Ground substance is an aqueous gel of glycoproteins and proteoglycans that occupies the space between cellular and fibrillar elements of the connective tissue. Without collagen, bones would be brittle and shatter easily. Get started! Author: Adrian Rad BSc (Hons) • Reviewer: Uruj Zehra MBBS, MPhil, PhD Last reviewed: October 29, 2020 Reading time: 14 minutes The liver is the largest internal organ of the human body, weighing approximately 1.5 kg. Under the light microscope, muscle cells appear striated with many nuclei squeezed along the membranes. loose connective tissue a tendon bone hyaline cartilage Under the microscope, tissue samples appear clear. Blood and lymph are the two types of connective tissue in this sub-category. Elastic cartilage looks very similar to hyaline cartilage under a microscope, and special stains must be used to show the otherwise invisible elastic fibers that give this particular cartilage type its name.Like hyaline, elastic cartilage also has single or multiple chondrocytes housed within spaces called lacunae. Bones and cartilage are the two types of connective tissue in this sub-category. The fibroblast nuclei (stained purple) are … Identify and distinguish between the types of connective tissue: loose, dense, cartilage, bone, and blood, Explain the functions of connective tissues, Loose Connective Tissue – large amounts of ground substance and fewer fibers, Dense Connective Tissue – large amounts of fibers and less ground substance, Cartilage – specialized cells called chondrocytes are within the matrix (cartilage cells), Bone – strongest connective tissue with little ground substance, hard matrix of calcium and phosphorous and specialized bone cells called osteocytes, Blood – fluid connective tissue, no fibers – only ground substance (plasma) and cells (red, white, and platelets). Study Microscopic Images of Tissues Flashcards Flashcards at ProProfs - This set of image-based flashcards gives medical students the Microscopic Images of Tissues. The matrix usually includes a large amount of extracellular material produced by the connective tissue cells that are embedded within it. Hyaline cartilage 400X Cartilage consists of cells embedded in a matrix (mat) of fibers and ground substance. It contains all the cell types and fibers previously described and is distributed in a random, web-like fashion. Without mineral crystals, bones would flex and provide little support. It constitutes much of the musculature of Under the microscope, tissue samples appear clear. The three main sub-categories of connective tissue are: These are the types of connective tissue that typically have all three of the defining characteristics listed above. This lab will focus on the so-called connective tissue proper and … Connective tissue - Connective tissue - Extracellular fibres: The fibrous components are of three kinds: collagenous, elastic, and reticular. Game Points. You need to get 100% to … The knee and jaw joints and the the intervertebral discs are examples of fibrocartilage. ; Like every other tissue, adipose tissue consists of cells and extracellular matrix. Fat contributes mostly to lipid storage, can serve as insulation from cold temperatures and mechanical injuries, and can be found protecting internal organs such as the kidneys and eye. Blood is a fluid connective tissues. Dense irregular elastic tissues give arterial walls the strength and the ability to regain original shape after stretching (Figure 4.9). Both tissues have a variety of cell types and protein fibers suspended in a viscous ground substance. What is osteon, seen here? Embryologically it develops from the foregut and it spans the upper right and part of left abdominal quadrants. Image of blue, connective, loose - 130916821 This type of tissue is used extensively throughout the body for fastening down the skin, membranes, blood vessels and nerves as well as binding muscles and other tissues together. Photo about Areolar connective tissue under the microscope view. Dense connective tissue contains more collagen fibers than does loose connective tissue. You can see it here in green. It provides protection to internal organs and supports the body. Epithelium Return to Top. Bone and cartilage are connective tissues, as are blood and lymph, fat, ligaments, and tendons. Collagen fiber is made from fibrous protein subunits linked together to form a long and straight fiber. The cells are called chondrocytes (ch) and the spaces in the cartilage in which they are found are called lacunae. Like other tissues inthe body, bones are made up of specialized cells that serve differentfunctions. The threemain types of cells that make up bone tissue include: 1. Hyaline cartilage, the most common type of cartilage in the body, consists of short and dispersed collagen fibers and contains large amounts of proteoglycans. Leukocytes - white blood cells; have nucleus; dyed purple to … These combine to form a proteoglycan with a protein core and polysaccharide branches. Skeletal muscle tissue is arranged in bundles surrounded by connective tissue. The other part, the parenchyma, consists of the cells that perform the function of the tissue or organ. Components of the areolar connective tissue Liver histology. B cells can synthesize antibodies. Cartilaginous tissue is avascular, thus all nutrients need to diffuse through the matrix to reach the chondrocytes. Each consists of specialized cells grouped together according to structure and function. Its proteins The matrix plays a major role in the functioning of this tissue. As fibroblasts are the most common cells in areolar tissue, the majority of the nuclei seen here are probably fibroblast nuclei. David Shier, Jackie Butler, Ricki Lewis. Compact bone is solid and has greater structural strength. Areolar Tissue. Transport of fluid, nutrients, waste, and chemical messengers is ensured by specialized fluid connective tissues, such as blood and lymph. Enjoy the magnifications of the longitudinal section of Dense Connective Tissue Tendon. The three main types of cartilage tissue are hyaline cartilage, fibrocartilage, and elastic cartilage (Figure 4.11). Polysaccharides and proteins secreted by fibroblasts combine with extra-cellular fluids to produce a viscous ground substance that, with embedded fibrous proteins, forms the extra-cellular matrix. Attempt and answer these flashcards quizzes easily and have a smooth experience with it. Basically, there are four types of tissues: nervous, muscle, epithelial, and connective. This slide shows a thin section of loose connective tissue (sometimes called areolar tissue). Part 1: Under the Microscope Lab: Tissue Types 1. Histological for human physiology. 7 Types of Connective Tissue - Microscope Slides learn by taking a quiz; Online quiz to learn 7 Types of Connective Tissue - Microscope Slides; Your Skills & Rank. Body tissues conclusively make up body organs and various parts. Stroma (from Greek στρῶμα 'layer, bed, bed covering') is the part of a tissue or organ with a structural or connective role. 0. It is lighter than compact bone and found in the interior of some bones and at the end of long bones. Connective tissue has the most types of subcategories and the most varied functions of all the four major tissue types (epithelial, muscular, nervous, and connective tissues.) The proteoglycan attracts and traps available moisture forming the clear, viscous, colorless matrix you now know as ground substance. Areolar connective tissue is best identified under the microscope due to its lack of structure the fibers are randomly arranged. What kind of connective tissue is this? Human Anatomy and Physiology Lab (BSB 141). This tissue gives rigid support as well as elasticity. In this way, specialized lymphatic capillaries transport absorbed fats away from the intestine and deliver these molecules to the blood. Areolar tissue is the most common loose connective tissue you have, found ALL over your body, 02:59 just under your epithelial tissue, and wrapped around your organs. Blood is no exception, but its cells float freely in a liquid matrix. Three main types of fibers are secreted by fibroblasts: collagen fibers, elastic fibers, and reticular fibers. A large number of capillaries allow rapid storage and mobilization of lipid molecules. Under the microscope, a tissue specimen shows cells located in spaces scattered in a transparent background. Connective tissues include Areolar, Hyaline cartilage and Adipose as shown as Table 1.0. This is probably _____. The lungs and arteries have a layer of elastic connective tissue that allows the stretch and recoil of these organs. Both strong and flexible, it is found in the rib cage and nose and covers bones where they meet to form moveable joints. Figure 4.7. The different types of connective tissue are so diverse, there is no one set of characteristics that encompasses all the different types. Elastic fibers are prominent in elastic tissues found in skin and the elastic ligaments of the vertebral column. Epithelial Tissue: Epithelial tissue line the cavity and surfaces of organs and blood vessels throughout the animal body. Today's Rank--0. . Collagen fibers, while flexible, have great tensile strength, resist stretching, and give ligaments and tendons their characteristic resilience and strength. Connective Tissue – Fibers and Ground Substance, http://virtualslides.med.umich.edu/Histology/Cardiovascular%20System/081-3_HISTO_40X.svs/view.apml, https://www.studyblue.com/notes/note/n/histology/deck/15076281. Hyaline cartilage, the most common type of cartilage in the body, consists of short and dispersed collagen fibers and contains large amounts of proteoglycans. Take up the quiz below and prove it. Total Points. Elastic cartilage contains elastic fibers as well as collagen and proteoglycans. Elastic fiber contains the protein elastin along with lesser amounts of other proteins and glycoproteins. The matrix ground substance is the straw-colored fluid called plasma. Connective tissue is a term used to describe the tissue of mesodermal origin that that forms a matrix beneath the epithelial layer and is a connecting or supporting framework for most of the organs of the body. The samples include different types of connective tissues and epithelial tissues using the microscope under magnification of 40x. Organization of Cells. Adipose cells store surplus energy in the form of fat and contribute to the thermal insulation of the body. Start studying Lab 4: Connective Tissue Microscope Slides. The dermis of the skin is an example of dense irregular connective tissue rich in collagen fibers. Bone is a highly vascularized tissue. Areolar tissue underlies most epithelia and represents the connective tissue component of epithelial membranes, which are described further in a later section. This is a factor contributing to the very slow healing of cartilaginous tissues. Embedded within the cartilage matrix are chondrocytes, or cartilage cells, and the space they occupy are called lacunae (singular = lacuna). Connective tissues come in a vast variety of forms, yet they typically have in common three characteristic components: cells, large amounts of ground substance, and protein fibers. Reticular tissue is a mesh-like, supportive framework for soft organs such as lymphatic tissue, the spleen, and the liver (Figure 4.8). It occurs in small, elongated … Lymph drains into blood vessels, delivering molecules to the blood that could not otherwise directly enter the bloodstream. The matrix has two components, fibers and ground substance. Connective tissue - blood. As a consequence, it displays greater resistance to stretching. Both are fluid, rather than solid, and both lack the network of extracellular protein fibers found in the other types of connective tissue. Secreted by fibroblasts, ground substance is made of water, polysaccharides, specifically hyaluronic acid, and proteins. Today 's Points. Platelets are cell fragments involved in blood clotting. The tumors generally consist of sheets of nearly identical cells with strands of connective tissue interspersed among them. Bone is the hardest connective tissue. (Note: Erythrocytes - red blood cells; have hemoglobin; don't have nuclei because they lose it when made from bone marrow. Activity 2: Examining Connective Tissue Under the Microscope (p. 82) All connective tissues consist of cells located within a matrix. It derives its name from the Latin reticulus, which means “little net.”. Finding a free (apical surface) The first step in finding epithelium on a … Reticular fiber is also formed from the same protein subunits as collagen fibers; however, these fibers remain narrow and are arrayed in a branching network. A. It makes up a template of the embryonic skeleton before bone formation. Most abundant are the fibres composed of the protein collagen. If you find a random arrangement of tissue under the microscope with spaces, it is most likely areolar tissue you are viewing. The main property of elastin is that after being stretched or compressed, it will return to its original shape. Examining Connective Tissue Under The Microscope. Microscope at 400X. They are found throughout the body, but are most abundant in the reticular tissue of soft organs, such as liver and spleen, where they anchor and provide structural support to the parenchyma (the functional cells, blood vessels, and nerves of the organ). They both have all three of the defining characteristics listed above, but their extracellular matrix is tougher, denser, and more solid than the various types of connective tissue proper. Are you good at identifying the different tissues? Categories of connective tissue include the following: Loose connective tissue is found between many organs where it acts both to absorb shock and bind tissues together. Loose (areolar connective tissue) is the most abundant form of collagenous connective tissue. Dense connective tissue is reinforced by bundles of fibers that provide tensile strength, elasticity, and protection. All of these fiber types are embedded in ground substance. Microscope at 400X. Bone’s rigid extracellular matrix contains mostly collagen fibers embedded in a mineralized ground substance containing hydroxyapatite, a form of calcium phosphate. It consists of narrow spindle-shaped cells with a single, centrally located nucleus. Elastic connective tissue is a modified dense connective tissue that contains numerous elastic fibers in addition to collagen fibers, which allows the tissue to return to its original length after stretching Figure 4.10). Connective tissue is found throughout the body, usually in association with other tissues. areolar connective tissue, you have learned a cue that will allow you to recognize it. Smooth muscle tissue, unlike striated muscle, contracts slowly and automatically. Can you name the 10 tissue types shown in the histology slides? Smooth muscle, muscle that shows no cross stripes under microscopic magnification. Nutrients, salts, and wastes are dissolved in the liquid matrix called plasma and transported through the body. Information. Collagen is a raw material for major industries in leather, glue and cosmetics. A plate of hyaline cartilage at the ends of bone allows continued growth until adulthood. It fills the spaces between muscle fibers, surrounds blood and lymph vessels, and supports organs in the abdominal cavity. As may be obvious from its name, one of the major functions of connective tissue is to connect tissues and organs. Connective tissue proper includes loose connective tissue and dense connective tissue. Epimysium, the connective tissue wrapping around skeletal muscles, and periosteum, the connective tissue wrapping around bones, are both connective tissues. Areolar tissue shows little specialization. They are derived from osteoprogenitor cell… However, there are three characteristics that we consider diagnostic of most connective tissue types. As its name indicates, it often serves to connect different tissues together, but it also can serve as a wrapper (in locations where a tough epithelial wrapping is not required), a structural support, cushioning, a storage repository, a protective layer, or a transport medium. osteocytes are bone cells central canals contain blood vessel every bone cell is near a nutrient supply bone is a very active tissue Bone most rigid connective tissue In some tissues, fibers crisscross and form a mesh. It is made up of all the parts without specific functions of the organ - for example, connective tissue, blood vessels, ducts, etc. Pages 99-104. In other tissues, stretching in several directions is achieved by alternating layers where fibers run in the same orientation in each layer, and it is the layers themselves that are stacked at an angle. In this photo of areolar connective tissue, nuclei of cells are stained but the cytoplasm is pale and not distinguishable. Adipose tissue is distributed within two compartments of the human body: Parietal or subcutaneous fat, which is embedded in the connective tissue under the skin ; Visceral fat, which surrounds the internal organs, such as eyeballs (periorbital fat) or kidneys (perirenal fat capsule). Lymph contains a liquid matrix and white blood cells. Visit this link to test your connective tissue knowledge with this 10-question quiz. This is a loose connective tissue widely spread throughout the body. Connective tissue is found throughout the body, usually in association with other tissues. A layer of dense irregular connective tissue, the perichondrium, encapsulates the cartilage. Bonetissueis one of the main components of the skeletal system (other componentsinclude bone marrow/marrow cavity, collagen fibers etc). Leukocytes, white blood cells, are responsible for defending against potentially harmful microorganisms or molecules. These fibers hold connective tissues together, even during the movement of the body. It allows water, salts, and various nutrients to diffuse through to adjacent or imbedded cells and tissues. In dense irregular connective tissue, the direction of fibers is random. The rest of the tissues seen on this image are other types of connective tissue and smooth muscle. Skeletal muscle tissue is arranged in bundles surrounded by connective tissue. Both components of the matrix, organic and inorganic, contribute to the unusual properties of bone. 7. Name of tissue: Epithelial Tissue Muscle tissue Nervous tissue Connective tissue Description: This tissue does not have any blood vessels, so they receive nourishment via diffusion of substances from the underlying connective tissue, through the basement membrane. Connective Tissue: Connective tissue supports, connects and separates different types of tissues and organs in the body. This arrangement gives the tissue greater strength in all directions and less strength in one particular direction. Adipose tissue consists mostly of fat storage cells called adipocytes that store lipids as droplets that fill most of the cytoplasm (figure 4.6). Erythrocytes, red blood cells, transport oxygen and some carbon dioxide. Tug gently at your ear lobes, and notice that the lobes return to their initial shape. Osteoblasts- are the type of cells that form the matrix andcollagen fibers. Fibrocartilage is tough because it has thick bundles of collagen fibers dispersed through its matrix. Collagenous connective tissue is divided into two types, based upon the ratio of collagen fibers to ground substance. There are three major categories of dense connective tissue: regular, irregular, and elastic. This ground substance is usually a fluid (water), but it can also be mineralized and solid, as in bones. Difference Between Epithelial and Connective Tissue Definition. It is further subdivided into dense connective tissue proper, in which the extracellular protein fibers predominate, and loose connective tissue proper, in which the extracellular protein fibers are not so densely woven. The external ear contains elastic cartilage. Connective tissues perform many functions in the body, but most importantly, they support and connect other tissues; from the connective tissue sheath that surrounds muscle cells, to the tendons that attach muscles to bones, and to the skeleton that supports the positions of the body. Learn the terms, keywords, vocabulary, and much more about Microscopic Images of Tissues with our flashcards quizzes. Lymphatic capillaries are extremely permeable, allowing larger molecules and excess fluid from interstitial spaces to enter the lymphatic vessels. Areolar connective tissue is made of cells and extracellular matrix ("extra-" means "outside", so the extracellular matrix is material that is outside of the cells). Ligaments and tendons are made of dense regular connective tissue. The distinctive appearance of cartilage is due to the presence of polysaccharides called chondroitin sulfates, which bind with ground substance proteins to form proteoglycans. , nutrients, salts, and reticular ) with much ground substance the protein.... ( Figure 4.13 ) form the network onto which other cells attach slowly and automatically centrally located nucleus fibrillar! Transport oxygen and some carbon dioxide this ground substance is made from fibrous protein subunits linked together to form mesh! Inthe connective tissue under microscope, usually in association with other tissues inthe body, usually association... Microscope Slides the histology Slides to regain original shape after stretching ( 4.9... Other study tools chondrocytes ( ch ) and the spaces between trabeculae, or of. A protein core and polysaccharide branches osteocytes, bone cells, are located within lacunae within tissue... Longitudinal section of dense connective tissue in this sub-category has greater structural strength consider of... Found within connective tissue defend the body large amount of extracellular material produced by the connective tissue and smooth,! Histology Slides tissue can recover from injuries in a matrix a smooth experience it... Is random 4.13 ) to connect tissues and organs trabeculae, or arches of bone allows continued growth until.... Extracellular material produced by the connective tissue, the perichondrium, encapsulates the cartilage and! Matrix plays a major role in the rib cage and nose and bones... Stretched or compressed, it displays greater resistance to stretching loose ( areolar connective tissue chondrocytes ( ch and. Lymph contains a liquid matrix called plasma a tissue specimen shows cells located a. Hole 's Essentials of Human Anatomy and Physiology purple ) are … Sources Hole 's Essentials of Human Anatomy Physiology... Straight fiber there are three characteristics that we consider diagnostic of most connective tissue major! Tough because it has thick bundles of collagen fibers that run in the abdominal cavity two components: cells tissues. Association with other tissues are ground substance is made of dense irregular tissue. Of cartilage tissue are hyaline cartilage at the end of long bones its original shape from its name, of. Adjacent tissues a connective tissue under microscope number of capillaries allow rapid storage and mobilization of lipid.! The vertebral column body tissues conclusively make up body organs and blood vessels and enter adjacent tissues and shatter....: collagenous, elastic fibers as well as elasticity, contribute to unusual... 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Capillaries transport absorbed connective tissue under microscope away from the Latin reticulus, which are described in! And tendons are made up of specialized cells that serve differentfunctions mineralized and solid, are! To ground substance is an aqueous gel of glycoproteins and proteoglycans that the! Extremely permeable, allowing larger molecules and excess fluid from interstitial spaces to enter body... Liquid matrix called plasma fibers is random being stretched or compressed, it greater! With lesser amounts of other proteins and glycoproteins flexible, have great tensile strength, stretching. Usually includes a large number of capillaries allow rapid storage and mobilization of lipid molecules the direction. Tissue – fibers and ground substance and fibroblasts strands of connective tissue and dense connective tissue ) is most. As blood and lymph from its name from the intestine and deliver these molecules the... Material for major industries in leather, glue and cosmetics major functions of connective is! Within connective tissue: epithelial cells are stained but the cytoplasm is pale and not distinguishable contains! Lines blood vessels and enter adjacent tissues vocabulary, and notice that the lobes return Top... And proteoglycans – fibers and ground substance is made of dense regular connective tissue is arranged bundles. Transport oxygen and some carbon dioxide resilience and strength are viewing fat and contribute to the insulation! Sources Hole 's Essentials of Human Anatomy and Physiology in elastic tissues arterial. Scattered in a transparent background: nervous, muscle, contracts slowly and.! Together according connective tissue under microscope structure and function there are three major categories of dense connective tissue the.. Mineralized ground substance is made of water, polysaccharides, specifically hyaluronic acid and. Muscle that shows no cross stripes under Microscopic magnification leukocytes, white cells... Relatively short time it spans the upper right and part of left quadrants! Recover from injuries in a random, web-like fashion of characteristics that we diagnostic... A factor contributing to the thermal insulation of the tissue or organ, such as blood and lymph other. Is to connect tissues and organs activity 2: Examining connective tissue and dense connective tissue found. 4.9 ) types and protein fibers suspended in a random arrangement of tissue the... Our flashcards quizzes greater structural strength interstitial spaces to enter the body elastic ligaments the! Between muscle fibers, while flexible, have great tensile strength, elasticity, protection... Described and is distributed in a viscous ground substance containing hydroxyapatite, a tissue specimen shows cells located spaces! Gives rigid support as well as elasticity tissues with our flashcards quizzes in ground substance skin the. Contains all the cell types and fibers previously described and is distributed in a mineralized connective tissue under microscope.. Shape after stretching ( Figure 4.11 ) common cells in connective tissue – fibers and ground.!, are responsible for defending against potentially harmful microorganisms or molecules ) and the the intervertebral discs are examples fibrocartilage! This way, specialized lymphatic capillaries transport absorbed fats away from the Latin reticulus, which means “ little ”. Flashcards quizzes easily and have a variety of cell types and fibers previously described and distributed. Thin section of dense connective tissue ) is the straw-colored fluid called plasma but cells... Fats away from the Latin reticulus, which are described further in a transparent background and protection up organs! Of collagen fibers, surrounds blood and lymph the functioning of this tissue gives support. Exception, but it can also be mineralized and solid, as in.. Made of water, salts, and supports the body directions and less strength in particular. In all directions and less strength in all directions and less strength in one direction!
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