connective_tissue

connective_tissue - =\‘ fivm Susan Wilson’s...

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Unformatted text preview: =\‘ fivm Susan Wilson’s Classification of CT types Course Noe-£5 embryological CT - mesenchyme - all CT develops from this tissue Connective Tissue Proper loose - fibers are loosely woven, there are many cells looks like spider web in dissection areolar —- 4 cell types (fibroblast, macrophage, mast, plasma), all fiber types; dermis, subcutaneous liver, mucous membranes adipose - adipocytes supports, protects, fi1e1 supply, insulates subcutaneous for layer reticular — reticular cells & fibers forms stroma of organs, binds smooth muscle dense - dense, thick fibers, fewer cells — mostly fibroblasts regular- ordered bundles of collagen fibers; withstands pulling forces; ligaments, tendons irregular - irregularly ordered collagen fibers, withstands twisting forces dermis, periosreum, v _ organ capsules, joint capsules peri'chordn'wn’ elastic — resilient artery walls, lungs, trachea, bronchi Su pporting’ Connective Tissue cartilage - strength from fibers hyaline — most common, prominent cells, weakest joints, nose, trachea fibrocartilage - strongest, rigid pubic symphysis, interverrebral discs, menisci elastic cartilage — contains elastic fibers epiglortis, external ear bone - osseous tissue, 2 kinds - compact & spongy Fluid Connective Tissue blood - vascular tissue, formed elements + liquid ground substance - plasma lymph - tissue fluid in lymphatic vessels Connective Tissue Proper - classification loose areolar . the universal packing material of the body; supports epithelium, fills spaces between organs least specialized, has fibroblasts, defense cells, all 3 fiber types looks like spider web in dissection holds water, soaks up extra water during inflammation => edema forms papillary region ofdennis lamina propria of subcutaneous tissue (CTpart of mucous membranes) adipose cells are adipocytes mostly cells, not much matrix cells are mostly lipid - cytoplasm is pushed to one side accumulates in areolar tissue - subcutaneous layer acts there as shock absorber, insulator, fuel supply reticular resembles areolar except all fibers are reticular reticular fibers form a network, reticular cells lie in it reticular fibers are widely distributed, don’t stain wl H&E, can be stained black reticular tissue is limited in location: lymph nodes, spleen, liver, marrow dense regu la 1' dominated by collagen fibers in bundles & fibroblasts fibers run parallel to direction of pull, along a single axis withstands pulling forces: ligaments & tendons histologylslides - collagen looks like solid wavy pink bundles irregular fibers are irregularly placed, can withstand pull fi‘om any direction, very strong reticular region of dermis (leather), fibrous coverings of kidney, testis, joint capsule elastic like irregular but has lots of elastic fibers not very strong but very elastic walls of arteries, lungs 18 ...
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connective_tissue - =\‘ fivm Susan Wilson’s...

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