ANAT 215 Lecture Notes - Lecture 30: Tunica Intima, Loose Connective Tissue, Simple Squamous Epithelium
7 Aug 2015
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Document Summary
Lecture 30 ~ blood vessels [cardiac output: 35% in arteries, 65% in veins] Tunica intima [interna] is composed of simple squamous epithelium. [endothelium attached to the basement membrane], associated with loose connective tissue [sub-endothelial layer on the outside]. Tunica media is composed of smooth muscle [contraction and relaxation] oriented in circular fashion, and elastic fibers [stretching and recoiling]. The tunica media is the generally the thickest layer. Tunica externa [adventitia] is composed of loose connective tissue. [attachment], collagen [strength and flexibility], and elastic fibers. Muscular [distributing] arteries aorta large arteries near the heart. large lumen, d = 2. 5 cm tunic media has many elastic fibers and little smooth muscle. Continuous capillaries d = 8 um, 1 cell, tunica intima most common found almost everywhere.
