ANAT 261 Lecture Notes - Lecture 12: Collagen, Bradykinin, Blood Pressure
16 Mar 2012
School
Department
Course
Professor
Document Summary
Have 1-2 layers of smooth muscle cells and ielm is not properly defined. The smooth muscle cells in a longitudinal section appear as if it were a cross section. Looks similar to duct of sweat gland in the epidermis so be careful. Duct has 2-3 layers of nuclei, but no other layers outside (i. e no adventitia) Intima - endothelial cells, basement membrane, and internal elastica (just elastic fibers, no membrane which goes in the same direction/axis of arteriole). Media - smotth muscle cells, and reticular fibers. Adventitia - has fibrocytes, collagen type i and nerve fibers: the fibrocyte nuclei are darker and larger than the smooth muscle cell. Less than 0. 5mm in diameter, and metarterioles are much smaller. Hard to distinguish between capillaries and post-capillary venule. Whenever there"s a tiny structure with one red blood cell, then its a capillary since the diameter of both is 7 micrometers. The post-capillary venule has 2-3 red blood cells in it.
