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glossary:tissue [2008/04/27 13:45]
Pat O'Connor
glossary:tissue [2012/10/16 14:40] (current)
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 +(1) A tissue in medicine is not like a piece of tissue paper. It is a broad term that is applied to any group of [[cell]]s that perform specific functions. A tissue in medicine need not form a layer. ​
 +
 +  * The [[bone marrow]] is a tissue
 + 
 +  * [[Connective tissue]] consists of cells that make up fibers in the framework supporting other body tissues;
 + ​and ​
 +
 +  * [[Lymphoid tissue]] is the part of the body's [[immune system]] that helps protect it from [[bacteria]] and other foreign entities.
 +
 +(2) A tissue is an aggregate of cells in an [[organism]] that have similar structure and function ​
 +
 +The fundamental types of tissues in animals are [[epithelial]],​ nerve, connective, muscle, and [[vascular]] tissues whereas in plants, they are the meristematic (apical meristem and cambium), protective (epidermis and cork), fundamental (parenchyma,​ collenchyma and sclerenchyma) and vascular (xylem and phloem) tissues. Tissues that work in unison to carry out a specific set of functions form an organ. ​
 +
 +**adenoid tissue** - lymphoid tissue.
 +
 +**adipose tissue** - connective tissue made of fat cells in meshwork of areolar tissue.
 +
 +**areolar tissue** - connective tissue made up largely of interlacing fibers.
 +
 +**bony tissue** - bone.
 +
 +**brown adipose tissue** - a thermogenic type of adipose tissue containing a dark pigment, and arising during embryonic life in certain specific areas in many mammals, including humans; it is prominent in the newborn.
 +
 +**cancellous tissue** - the spongy tissue of bone.
 +
 +**cartilaginous tissue** - the substance of cartilage.
 +
 +**chromaffin tissue** ​ - a tissue composed largely of chromaffin cells, well supplied with nerves and vessels; it occurs in the adrenal medulla and also forms the paraganglia of the body.
 +
 +**cicatricial tissue ** - the dense fibrous tissue forming a cicatrix, derived directly from granulation tissue.
 +
 +**connective tissue** - the stromatous or nonparenchymatous tissues of the body; that which binds together and is the ground substance of the various parts and organs of the body.
 +
 +**elastic tissue** - elastic tissue, yellow connective tissue made up of yellow elastic fibers, frequently massed into sheets.
 +
 +**endothelial tissue** - endothelium.
 +
 +**epithelial tissue** - epithelium.
 +
 +**erectile tissue** - spongy tissue that expands and becomes hard when filled with [[blood]].
 +
 +**extracellular tissue** - the total of tissues and body fluids outside the cells.
 +
 +**fatty tissue** - [[adipose]] tissue.
 +
 +**fibrous tissue** - the common connective tissue of the body, composed of yellow or white parallel fibers.
 +
 +**gelatinous tissue** - mucous tissue (see - [[mucous membrane]]).
 +
 +**glandular tissue** - an aggregation of [epithelial]] cells that elaborate secretions.
 +
 +**granulation tissue** - the newly formed vascular tissue normally produced in healing of wounds of [[soft tissue]], ultimately forming the cicatrix.
 +
 +**gut-associated lymphoid tissue** - (GALT) [[lymphoid tissue]] associated with the gut, including the [[tonsils]],​ Peyer'​s patches, lamina propria of the gastrointestinal tract, and appendix.
 +
 +**indifferent tissue** - undifferentiated embryonic tissue.
 +
 +**interstitial tissue** - [[connective tissue]] between the cellular elements of a structure.
 +
 +**lymphadenoid tissue** - tissue resembling that of [[:lymph nodes]], found in the [[spleen]], [[bone marrow]], tonsils, and other organs.
 +
 +**lymphoid tissue** - a latticework of reticular tissue, the interspaces of which contain [[lymphocyte]]s.
 +
 +**mesenchymal tissue** - mesenchyme.
 +
 +**mucous tissue** - a jellylike connective tissue, as occurs in the umbilical cord.
 +
 +**muscle tissue** - muscular tissue the substance of muscle, consisting of muscle fibers, muscle cells, connective tissue, and extracellular material.
 +
 +**myeloid tissue** - red [[bone marrow]].
 +
 +**nerve tissue** - nervous tissue the specialized tissue making up the central and peripheral nervous systems, consisting of neurons with their processes, other specialized or supporting cells, and extracellular material.
 +
 +**osseous tissue** - the specialized tissue forming the bones.
 +
 +**reticular tissue** - reticulated tissue [[connective tissue]] consisting of reticular cells and fibers.
 +
 +**scar tissue** - cicatricial t.
 +
 +**sclerous tissues** - the cartilaginous,​ fibrous, and osseous tissue.
 +
 +**skeletal tissue** - the bony, ligamentous,​ fibrous, and cartilaginous tissue forming the skeleton and its attachments.
 +
 +**subcutaneous tissue** - the layer of loose connective tissue directly under the [[skin]].
 +
 +**white adipose tissue** - yellow adipose tissue the [[adipose tissue]] comprising the bulk of the body fat.
 +
 +**tissue death**
 +see [[necrosis]].
 +
 +**tissue density**
 +the penetrability of tissue by [[x-ray]]s, bone and tooth being most dense, [[blood]] and [[soft tissue]] the next, fat the next, and gas and air least.
 +
 +**tissue edema**
 +an abnormal accumulation of tissue fluid.
 +
 +**tissue factor**
 +see tissue thromboplastin.
 +
 +**tissue fluid**
 +the extracellular fluid that constitutes the environment of the body cells. It is low in protein, is formed by filtration through the [[capillaries]],​ and the excess drains away as [[lymph]]. See also [[interstitial fluid]].
 +
 +**tissue inhibitors**
 +inhibitors of fibrinolysis;​ present in placenta.
 +
 +**indifferent tissue**
 +undifferentiated embryonic tissue.
 +
 +**tissue necrosis fever**
 +fever caused by pyrogens released by necrotic pyrogens.
 +
 +**tissue plasminogen activator**
 +see plasminogen activator.
 +
 +**tissue reacting agent**
 +substances that have a poorly defined but advantageous local effect on tissues.
 +
 +**tissue receptor site**
 +a cell receptor common to [[cell]]s of a particular tissue.
 +
 +**tissue residue**
 +residues of chemical substances that are unacceptable to local pure food legislation especially sulfonamides,​ estrogens, chlorinated hydrocarbons,​ heavy metals. These are thought or known to have a deleterious effect on people eating or drinking the relevant animal product. See also chemical food residue.
 +
 +**tissue sensitivity**
 +the susceptibility of individual tissues to injury by x-ray. The injury may be by way of inflammation,​ necrosis or cessation of cell growth. Fast-growing tissues in which the cells have a high mitotic index are the most sensitive, especially gonads, germinative layer of skin and erythropoietic tissues.
 +
 +**supportive tissues**
 +cartilage and bone.
 +
 +**tissue therapy**
 +see glandular therapy.
 +
 +**tissue typing**
 +identification of tissue types for purposes of predicting acceptance or rejection of grafts and organ transplants. The process and purposes of tissue typing are essentially the same as for [[blood typing]]. The major difference lies in the kinds of antigens being evaluated. [[White blood cells]], particularly lymphocytes,​ are used for tissue typing. The acceptance of allografts depends particularly on the matching of MHC [[antigen]]s. If the donor and recipient are not MHC identical, the allograft is rejected. See also typing.
  
glossary/tissue.txt ยท Last modified: 2012/10/16 14:40 (external edit)