lymphoid tissue

tissue /tis·sue/ (tish´u) an aggregation of similarly specialized cells which together perform certain special functions.

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adenoid tissue  lymphoid t.

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 t.

fibrous tissue  the common connective tissue of the body, composed of yellow or white parallel fibers.

gelatinous tissue  mucous t.

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 lymphocytes.

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.

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lymphoid tissue

n.

See lymphatic tissue.

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Lymphoid tissue

Sites within the body that produce cells of the immune system, including lymph nodes, bone marrow, and the thymus.

Mentioned in: MALT Lymphoma

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lymphoid tissue

Etymology: L, lympha, water; Gk, eidos, form; OFr, tissu

tissue that consists of lymphocytes on a framework of reticular cells and fibers, as the tonsils and adenoids.

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lymphoid

resembling or pertaining to lymph or to tissue of the lymphatic system.

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bronchus-associated lymphoid tissue (BALT)

aggregations of B and T lymphocytes in the lower respiratory tract.

lymphoid cells

lymphocytes and plasma cells.

lymphoid foci

small foci of lymphoid tissue which occur in almost all parenchymatous organs in birds. The foci are not encapsulated and blend with the surrounding tissue.

lymphoid follicles

see lymph nodule.

lymphoid granuloma

one of the lesions in chronic follicular pharyngitis in the horse and a cause of persistent cough, difficulty in swallowing and a stertorous respiration.

gut-associated lymphoid tissue (GALT)

aggregations of mucosal-associated lymphoid tissue in the gastrointestinal tract, including adenoids, tonsils, Peyer's patches and lamina propria of the intestine; responsible for a local immune response to antigens.

lymphoid leukemia

see lymphatic leukemia.

lymphoid leukosis

a very rare primary tumor in mammals characterized by high blood lymphocyte counts. It is the most common form of the avian leukosis complex of diseases caused by avian retroviruses. Birds are affected between the ages of 14 to 30 weeks and show nonspecific signs of emaciation, inappetence and weakness, but many also have enlarged abdomens and a palpably enlarged liver. The primary lesion is the transformation of B lymphocytes in the lymphoid follicles of the bursa of Fabricius, but multiple metastatic lesions occur in the liver, spleen, etc.

mucosal-associated lymphoid tissue (MALT)

aggregations and organized lymphoid cells tissue found immediately beneath mucous membranes lining the respiratory, gastrointestinal and urogenital system.

lymphoid organs

primary lymphoid organs include the thymus and the bursa of Fabricius and its mammalian equivalent; secondary lymphoid organs include lymph nodes, spleen, Peyer's patches, etc.

skin-associated lymphoid tissues

include a group of non-activated T lymphocytes and Langerhans cells derived from lymphatic or hematopoietic tissues which have antigen-presenting properties; enable the skin to maintain a functional immunological relationship with the immune system. Called also SALT.

lymphoid system

the lymphoid tissue of the body, collectively; it consists of the bone marrow, thymus, lymph nodes, spleen, and gut-associated lymphoid tissue (tonsils, Peyer's patches).

lymphoid tissue

a lattice work of reticular tissue, the interspaces of which contain lymphocytes.

lymphoid tumor

see lymphoma, lymphosarcoma, thymic lymphoma, leukemia.