Term
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Definition
| closely packed; cells attached to basement membrane; cells are joined by a junctional complex (tight junctions, desmosomes, and gap junctions). |
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Term
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Definition
| specialized connections between epithelial cells and certain muscle and connective tissue cells. |
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Term
| Tight junctions aka zona occludens |
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Definition
| most important in restricting transport between cells which form a semipermeable membrane, for instance, the wall of a capillary. They are NOT important in structural support. |
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Term
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Definition
| passageways through the tight junctions which allow water and small molecules to pass between cells in some locations (in the kidneys), while other allow very little to pass through (in the brain) |
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Term
| Desmosomes aka macula adherens |
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Definition
| contain keratin filaments which run from one cell to the next laterally and are important in tissues where the cells are subjected to lateral stress, such as the skin or the lining of the urinary bladder; like spot welds. |
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Term
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Definition
| small bundles of keratin filaments which anchor the basal membrane of an epithelial cell to the underlying connective tissue. |
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Term
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Definition
| continuous adhesions composed of joining proteins that anchor cells to one another near the apical end. |
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Term
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Definition
| include channels called "connexons" which allow ions, and therefore, electrical impulses to pass from one cell to the next. Best examples of where they can be fund are in between cardiac muscle cells in the heart and smooth muscle cells in the intestine, and also, between osteocytes in the lamellar bone. |
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Term
| Simple Squamous Epithelium |
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Definition
| the thinnest tissue in the body; forms semipermeable membranes in the lungs, and capillaries; secretes serous fluid in serous membranes; lines cardiovascular system, covers organs, forms glomerular capsules in the kidney. |
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Term
| Simple cuboidal epithelium |
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Definition
| forms ducts, tubules and secretory cells in exocrine glands and in organs such as the kidney. |
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Term
| Simple Columnar Epithelium |
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Definition
| It is non-ciliated in the GI tract, and is ciliated in portions of the respiratory and genitourinary tracts. |
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Term
| Ciliated simple columnar epithelium |
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Definition
| is found in large bronchioles of the respiratory tract and in the genitourinary tract where the cili beats in waves to move fluid along passageways. |
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Term
| Pseudostratified Ciliated Columnar Epithelium |
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Definition
| Primary lining of the respiratory tract. |
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Term
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Definition
| lines the renal calyces, the ureters, the urinary bladder and a portions of the urethra. Distension reduces the # of cell layers from 4 or 5 to 3. |
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Term
| Stratified Squamous Epithelium |
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Definition
| forms the outer layer or epidermis of the skin. |
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Term
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Definition
| supportive tissues are a derived from mesenchyme stem cells. The cells of this type of tissue are not usually close together and have a fluid called intercellular matrix between them. |
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Term
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Definition
| this fiber provides high tensile strength with some flexibility found in inelastic types of tissues such as tendons and ligaments. |
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Term
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Definition
| this fiber provides organs and tissues with the ability to stretch and recoil and is important in the walls of arteries and the internal support of the lungs. |
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Term
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Definition
| these fibers are made up of the same molecules as collagen but thinner; they form an internal mesh-like network within organs. |
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Term
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Definition
| these are part of the body's first line of defense against invading microorganism. |
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Term
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Definition
| this tissue is the most abundant connective tissue and is found outer dermis of skin. It's main function is to contain blood vessles and nerves which serve nearby tissues and its spaces contain most of the bodies extracellular fluid. |
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Term
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Definition
| this tissue has cells that are closely packed and it has little matrix. This tissue is important for shock absorption and insulation and is found around many organs such as the heart, eyes, kidneys, spleen etc. |
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Term
| Dense Irregular Connective tissue |
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Definition
| this tissue has few cells, mostly fibroblasts, and many fibers, principally collagen, arranged in an irregular pattern to provide strength and withstand stresses to which the organ may be subjected. It can be found in the deep dermis of the skin and in the submucosa of the hollow organs. |
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Term
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Definition
| this tissue forms the structures of tendons, ligaments, and fibrous joints. It is almost entirely collagen fibers in densely packed arrays, with rows between the fiber bundles. |
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Term
| Elastic Connective Tissue |
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Definition
| this tissue is found in the walls of the stroma of the lungs and sparingly in certain elastic ligaments. It makes the arteries flexible to absorb the pulse pressure, and gives the lungs their recoil. |
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Term
| Reticular Connective tissue |
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Definition
| this tissue is found as the internal support (stroma) of the kidneys, spleen, liver and many other soft organs. This tissue has reticular fibers ONLY. |
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Term
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Definition
| this tissue is considered "specialized connective tissue". Its intercellular matrix is more solid and gel-like, providing both flexibility and support. Its cells are located in spaces known as lacunae and has the same fibers as other connective tissues. |
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Term
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Definition
| this cartilage has organic fibers but they are very finely divided and cannot be seen in the light microscope. This is the most common type of cartilage, found in the nose, attached to the ribs, and as the cartilage model for bone development. |
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Term
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Definition
| this cartilage has dense bundle of elastic fibers and is rare, found only in the epiglottis and ear |
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Term
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Definition
| this cartilage has dense bundles of collagen fibers, it is the major component of the intervertebral disks and the symphysis pubis. |
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Term
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Definition
| repair in which the function of the replaced cells continues-usually refers to epithelial tissues. |
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Term
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Definition
| repair in which fibrous tissue knits the damaged parts together but doesn't perform the tissues of original function-occurs in connective tissue and muscle. |
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Term
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Definition
| organ membranes because they are organs in their right, composed of two or more different tissues which work together to perform specific functions. In come cases, such as the GI tract, the membrane is, in fact, the organ. |
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Term
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Definition
| this membrane secretes serous fluid which decreases friction between the layers of membrane. Can be found in in the lining of closed cavities of the body and reflected over the organs in the cavities. |
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Term
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Definition
| secretes mucous to protect the lining, lubricate the propulsion of food, and remove particulates form the respiratory tract. It forms the structure of the GI, genitourinary, and respiratory passageways. |
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Term
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Definition
| forms joint capsules which lubricate joints, and bursae which lubricate the movements of tendons and ligaments-secretes synovial fluid. Composed entirely of connective tissue. |
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Term
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Definition
| the skin; epidermis composed of stratified squamous epithelium; has many specialized cells and glands. |
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