Elastic fibers are composed of elastin molecules and can be found together with collagen fibers in tissues that require elasticity in addition to tensile strength, e.g., the lung. Connective tissue, therefore, is made up of cells and extracellular matrix. A substance received or given off by your body will likely pass through which tissue type? Endothelium provides a slick surface lining all hollow cardiovascular organs. Another type of connective tissue is tendons Rings of lamellae surround the Haversian canal. Skin, lung, and blood vessel walls have which tissue characteristic in common? Which of the following is an EXCEPTION. The organic matrix is similar to the matrix material found in other connective tissues, including some amount of collagen and elastic fibers. In the central nervous system, the three outer membranes (the meninges) that envelop the brain and spinal cord are composed of connective tissue. Figure 2. Bone, or osseous tissue, is a connective tissue that has a large amount of two different types of matrix material. Collagen molecules are the basis of collagen fibers and reticular fibers. They do not have uniform subunits comparable to the unit fibrils of collagen. As may be obvious from its name, one of the major functions of connective tissue is to connect tissues and organs. within the cartilage divide and secrete new matrix, Heart muscle cells would tend to separate without ________. Connective tissues are made up of a matrix consisting of living cells and a non-living substance, called the ground substance. Marfan syndrome is caused by a mutation in the fibrillin gene (FBN1)! The space between the formed elements of the tissue is filled with the matrix. Functions: The pigmented connective tissue gives colour to the structures. Two bones can be connected to each other by another type of connective tissue called the ligament. The fibrous connective tissue functions to provide strength to the inner layer of skin and … Ground substance 2 Chandrocytes 3. Reticular fibers are the third type of protein fiber found in connective tissues. Connective tissue contains three components: cells, fibers and ground substance. Erythrocytes are counted in millions in a blood sample: the average number of red blood cells in primates is 4.7 to 5.5 million cells per microliter. Some pathologists perform autopsies to determine the cause of death and the progression of disease. Adipocytes have small nuclei localized at the cell edge. The cells of the connective tissue are formed from embryonic cells called mesenchymal cells. Adipose tissues additionally serve as insulation to help maintain body temperatures, allowing animals to be endothermic, and they function as cushioning against damage to body organs. Spongy bone, inside the compact bone, is porous with web-like trabeculae. Bone can be divided into two types: compact and spongy. What is connective Tissue? http://cnx.org/contents/185cbf87-c72e-48f5-b51e-f14f21b5eabd@10.8, fibroblasts, macrophages, some lymphocytes, some neutrophils, irregular: skin regular: tendons, ligaments, hyaline: few collagen fibrocartilage: large amount of collagen, shark skeleton, fetal bones, human ears, intervertebral discs. Mast cells synthesize and release substances of physiological importance (e.g., heparin and histamine). They examine tissue specimens through a microscope to identify cancers and other diseases. A many-layered epithelium with cuboidal basal cells and flat cells at its surface would be classified as ________. areolar tissue soaks up excess fluid in an inflamed area. Select the correct statement regarding the stem cells of connective tissue: "Blast" cells are undifferentiated, actively dividing cells. The slightly granular material among the cells is a cytoplasmic fragment of a cell in the bone marrow. Blood is considered a connective tissue because it has a matrix, as shown in Figure 6. What should you do first with the sample? What are the three main components of connective tissue? When a connective tissue has a high concentration of cells or fibers, it has proportionally a less dense matrix. Sheep erythrocytes are even smaller at 4.6 µl. Osteocytes are found in lacunae of the bone. Adipose tissue helps to store energy in the form of fat, cushion internal organs, and insulate the body. Compact bone is organized into subunits called osteons, as illustrated in Figure 4. The structure of connective tissues is an extracellular matrix. III. Elastic fibers provide flexibility to the tissues. The matrix plays a major role in the functioning of this tissue. Which tissue in the wall of the uterus is required for labor contractions? Elastic cartilage has a large amount of elastic fibers, giving it tremendous flexibility. usually contains a large amount of matrix. Macrophages, lymphocytes, and, occasionally, leukocytes can be found in some of the tissues. Connective tissue refers to the matrix composed of the ECM, cells (primarily fibroblasts), and ground substance that is tasked with holding other tissues and cells together forming the organs. Erythrocytes (red blood cells), the predominant cell type, are involved in the transport of oxygen and carbon dioxide. Albumin 4. The chondrocytes exist in cavities in the matrix called lacunae. Platelets participate in the stages leading up to coagulation of the blood to stop bleeding through damaged blood vessels. Choose which tissue type likely functions to add support to an organ. Different types of lymphocytes make antibodies tailored to the foreign antigens and control the production of those antibodies. Connective tissues and their matrix components make up a large proportion of the total body mass, are highly specialized, and have a diversity of roles. Hyaline cartilage is also found at the ends of long bones, reducing friction and cushioning the articulations of these bones. Loose connective tissue is composed of loosely woven collagen and elastic fibers. The primary blast cell for connective tissue proper is the ________. We’d love your input. The salivary glands are a good example of a(n) ________ exocrine gland. 1. Figure 4. BONES Bones are a fourth example of connective tissue. Which tissue type would likely function to hold the kidneys in place? Which statement best describes connective tissue? A ciliated version of pseudostratified columnar epithelium containing mucus-secreting goblet cells ________. Collagen, which is the most abundant protein, constitutes about one-third of all body protein. Which of the following is true about epithelia? Connective tissues connect, support, and bind body structures together. The wavy lines seen between the lacunae are microchannels called canaliculi; they connect the lacunae to aid diffusion between the cells. Connective tissue is composed of cells and an extracellular matrix that binds the cells and organs, integrating all parts of the body. Erythrocytes are consistently the same size in a species, but vary in size between species. Which cells are commonly found wedged between simple columnar epithelial cells? Osteoblasts deposit bone material into the matrix and, after the matrix surrounds them, they continue to live, but in a reduced metabolic state as osteocytes. The load-bearing strength of connective […] The proportions of these components vary from one part of the body to another depending on the local structural requirements. Fibroblasts are motile, able to carry out mitosis, and can synthesize whichever connective tissue is needed. Adipose tissue is composed of cells called adipocytes that collect and store fat in the form of triglycerides for energy metabolism. Between the lamellae are cavities called lacunae. Generally speaking, connective tissues are largely non-living extracellular matrix. Compact bone is found in the shaft (or diaphysis) of a long bone and the surface of the flat bones, while spongy bone is found in the end (or epiphysis) of a long bone. Which of the following is NOT a step in tissue repair? The fiber type that gives connective tissue great tensile strength is ________. Which of the following epithelia forms the walls of the air sacs across which gas exchange occurs in the lungs? Adipose tissue, or fat tissue, is considered a connective tissue even though it does not have fibroblasts or a real matrix, and has only a few fibers. There are three types of cells in bone: osteoblasts, osteocytes, and osteoclasts. Fibrocartilage contains a large amount of collagen fibers, giving the tissue tremendous strength. Bone tissue forms the internal skeleton of vertebrate animals, providing structure to the animal and points of attachment for tendons. A cartilage with few collagen and elastic fibers is hyaline cartilage, illustrated in Figure 3. Connective tissue is made up of a material called a matrix, with cells embedded within. Which tissue type would likely function to hold the kidneys in place? Some tissues have specialized cells that are not found in the others. This tissue type can have very different structures according to the proportions of its components. For example, the average diameter of a primate red blood cell is 7.5 µl, a dog is close at 7.0 µl, but a cat’s RBC diameter is 5.9 µl. Connective tissue that provides support and framework for the body consists of fibrous proteins and nonfibrous ground substance in varying proportions depending on their functions.. 2. Connective tissue consists of three main components: cells, protein fibers, and an amorphous ground substance. A remnant of this cartilage persists in the outer portion of the human nose. Connective tissue connects structures in the body to provide support for organs, store fat, and transport substances. 19. Lymphocytes function primarily in the immune response to foreign antigens or material. Two additional leukocytes in the blood are eosinophils and basophils—both help to facilitate the inflammatory response. The presence of collagen in all connective tissue makes it one the most studied biomolecules of the extracellular matrix (ECM). Heparan sulfate Q12. Connective tissue is the most widely distributed of the primary tissues. Connective tissue is classified into two subtypes which are soft and specialized connective tissue. ________ epithelium appears to have two or three layers of cells, but all the cells are in contact with the basement membrane. Also present are various leukocytes (white blood cells) involved in immune response. The cells, called chondrocytes, make the matrix and fibers of the tissue. Unlike other types of tissues, connective tissues are classified more by the stuff in which the cells lie — the extracellular matrix — than by the cells themselves. Connective tissue is the most abundant tissue in the body, consisting of cells and extracellular matrix. Which of the following is NOT found in cartilage but is found in bone? They provide for mechanical support, movement, tissue fluid transport, cell migration, wound healing, and—as is becoming increasingly evident—control of metabolic processes in other tissues.1,2 Unlike the properties of epithelial, muscle, or nerve tissues, which depend primarily on their cellular elements, the properties of CT are determined primarily by the … This gives strength and flexibility to the tissue. Adipose tissue is made up of cells called adipocytes that collect and store fat in the form of triglycerides, for energy metabolism. All forms of connective tissue are composed of (1) extracellular fibres, (2) an amorphous matrix called ground substance, and (3) stationary and migrating cells. It is generally used as a jelly-like structure instead of cytoplasm in connective tissue. A pathologist may oversee clinical laboratories for the evaluation of body tissue and blood samples for the detection of disease or infection. The extracellular matrix is composed of glycosaminoglycans and proteoglycans. Collagen fibers are relatively wide and stain a light pink, while elastic fibers are thin and stain dark blue to black. D) It is composed mostly of extracellular matrix Its primary function is nutrient storage. the ground substance & fibers make up the extracellular matrix. The fluid portion of whole blood, its matrix, is commonly called plasma. Long bone 20. The principal cell of connective tissues is the fibroblast. Fibrocartilage comprises the intervertebral discs in vertebrate animals. A blood vessel and a nerve are found in the center of the structure within the Haversian canal, with radiating circles of lacunae around it known as lamellae. Two major components of the matrix are ground substance and protein fibers. The loose or areolar connective tissue is made up of many cell types and intercellular materials (matrix), which also comprise other connective tissues but in varying proportions. Which of the following statements is true of connective tissue? The fibers can be arranged irregularly or regularly with the strands lined up in parallel. Depending on the type of connective tissue, the fibers are either collagen fibers, reticular fibers, elastin fibers, or a combination of two or more types. Chondrocytes are found in spaces within the tissue called lacunae. All connective tissue consists of three main components: fibers (elastic and collagenous fibers), ground substance and cells. As illustrated in Figure 1, loose connective tissue has some fibroblasts; macrophages are present as well. Choose which tissue would line the uterine (fallopian) tubes and function as a "conveyer belt" to help move a fertilized egg towards the uterus. The material in the connective tissue gives it a loose consistency similar to a cotton ball that has been pulled apart. Inability to absorb digested nutrients and secrete mucus might indicate a disorder in which epithelial tissue? Connective tissue extracellular matrix is composed of ________. Connective tissue is a type of animal tissue made up of cells, fibers, and gel-like substances that supports and gives structure to the body. Fibrous connective tissues contain large amounts of collagen fibers and few cells or matrix material. Connective tissue is found between other tissue types and organs. Tissue cells are then contained in this intercellular matrix but … (b) Compact bone is organized into rings called osteons. Osteoclasts are usually found on the surface of the tissue. Which of the following is a modification of the simple columnar epithelium that allows for efficient absorption along portions of the digestive tract? Pigmented connective tissue is present in the choroid, ciliary body and iris of the eye and dermis of the human skin. Mesenchymal cells are most commonly found in ________ connective tissue. Select the correct statement regarding adipose tissue: Its primary function is nutrient storage. Spongy bone is made of tiny plates called trabeculae these plates serve as struts to give the spongy bone strength. The organic portion or protein fibers found in connective tissues are either collagen, elastic, or reticular fibers. The inorganic matrix consists of mineral salts—mostly calcium salts—that give the tissue hardness. 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