BIO 106 Lecture Notes - Lecture 5: Systolic Geometry, Heart Valve, Atrioventricular Node
Document Summary
Blood refreshed in lung, kidneys, intestine, liver. Transport: oxygen, carbon dioxide, waste products, nutrients, hormones. Protection: cells of immune system transported, helping protect body from infection. Regulation: maintain homeostasis of a variety of body"s conditions. Heart arteries arterioles capillaries venules veins ; repeat. 65% of systemic blood is held within veins. Every single cell is in contact with capillaries, provides thin layer over tissue. Arteries transport blood away from the heart, veins transport blood towards. Arteries have thick inner musculature, veins do not. Left and right sides separated by septum. 4 chambers: 2 atria and 2 ventricles. 2 sets of valves: semilunar valves, atrioventricular valves. Auricles allow atria to expand better when pumping blood is difficult. All blood enters heart through the vena cava. Left side initiates the systemic circuit, circulates oxygenated blood. Know what is going in and out on each side of the heart, oxygen levels and what is in the valves --- view slideshow.
