ZOO 3000 Lecture Notes - Lecture 7: Tunica Intima, Simple Squamous Epithelium, Microcirculation
11 Oct 2017
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Day 7: thurs, sept 28th cardiovascular system primary functions: 2) remove wastes, gases arteries, arterioles, capillaries, venules, veins i. e. it involves recirculation of the blood the cardiovascular system in vertebrates is a closed system the layers of vascular walls: common structural features of arteries and veins three layers. 1) tunica intima: includes endothelium, basal lamina, and in arteries, an internal elastic membrane. 2) tunica media: includes smooth muscle cells and an external elastic membrane the smooth muscle layer is important for blood flow control a connective tissue layer. 3) modulation of blood flow and vascular response. 6) modification of lipoproteins capillaries capillaries connect the arterial and venous components simple tube with endothelial cells and basal lamina cells are flat, curved, and often surrounded by pericytes (contractile) density is correlated with metabolic activity. 1) continuous capillaries found in muscles, lungs, and cns features: thick cytoplasm and pinocytosis. 2) fenestrated capillaries found in endocrine glands, intestinal mucosa, and kidney features:
