BIOL302 Lecture Notes - Tunica Intima, Loose Connective Tissue, Lymphatic System
5 Nov 2013
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Document Summary
Biol 302 histology tissues: blood and blood vessels. Wound healing: clot formation, tissue remodeling (scarring) Plasma: aqueous, exchange between tissue fluid and intracellular fluid, proteins. Blood cells: erythrocytes (red blood cells, leukocytes (white blood cells) Specialized for gas transport high in hemoglobin to bind oxygen. Immune response travel through blood then migrate into tissue. Granulocytes: visible secretory granules, multilobed nuclei, names stemmed from staining. Agranulocytes: secretory vesicles not visible, single nuclei. Hard to see granules dark blue/purple staining. Vasa vasorum: large vessels have own blood vessels. Function: distribute blood from heart to tissues away from heart. Have large tunica media smooth muscle regulates pressure. Endothelium only (pericytes: continuous capillaries, fenestrated capillaries, discontinuous capillaries. Paracrine secretions: block clotting, regulate blood flow, inflammation. Function: collect blood from tissues and return to heart. Valves: prevent backflow, in medium veins (muscular, extension of tunica intima (endothelium and connective tissue) Medium arteries = large tunica media, inner elastic lamina.
