KINE 3012 Lecture Notes - Endothelium, Arteriole, Aorta
3 Dec 2013
School
Department
Course
Professor
Document Summary
Ignore precapillary sphincters, these are terminal arterioles. Rely on the capillary network for gas exchange/fluid. When things diffuse from tissue-capillary, they have to go through the interstitial space. Concentration gradient because most of the movements are by diffusion. Size of the capillary, is the same as the diameter of a rbc. The wall of the capillary is comprised of one endothelial cell. Mitochondria placed as close to the capillary as possible. Rbc/blood in the vessels are travelling at a slower rate than the capillaries. Though the blood flow within the body is always 5l/min. There is a larger cross section surface area because of the millions of capillaries within the body. Fastest velocities within the aorta and slows down within the capillaries. The general velocity of the blood flowing through the veins is faster than the blood flowing through capillary. Benefits because additional time for substances to diffuse through.
