Histo Lec - M5 Connective Tissue Flashcards
is one of the 4 major types of tissues in the body of animals the major constituent of which is extracellular matrix
Connective tissue
provides support, binds together, and protects tissues and organs of the body
Connective tissue
polysaccharides formed of disaccharide sub-units composed of uronic acid and hexosamine
Glycosaminoglycans
(proteins with sugars attached where the protein forms the major part of the molecule).
Glycoproteins
most abundant protein in human body. Molecules of fibers are oriented to form a sort of lattic
Collagen fibers
form network of fibers. Stain black by silver salts. High glycoprotein content making them PAS-positive
Reticular fibers
form broad, often (but not always) wavy, diffusely stained bundles.
Elastic fibers
Stellate cells that have long, tapering, branching processes.
Fibroblasts
many present in loose connective tissue. May look similar to fibroblasts; however, they are actively phagocytic and rounded in appearance.
Macrophages
embryonic connective tissue cells. Resemble fibroblasts, but usually smaller.
Mesenchymal cells
form three-dimensional networks of cells that are in contact via long processes.
Reticular cells
wandering cells that contain basophilic granules composed of heparin
Mast cells
antibody producing B-lymphocytes. As with other lymphocytes found in connective tissue and identifying feature is the spoke-like arrangement of the chromatin within the nucleus.
Plasma cells
have shape similar to fibroblasts, but synthesize melanin that in the case of skin is transferred to other skin cells.
Pigment cells (melanocytes)
delicate, flexible, not very resistant to stress, well vascularized. All types of connective tissue cells present
Loose connective tissue