BIOL 1201 : Final Exam Biology Study Guide
Document Summary
Is thin-allows for diffusion of substances but thicker need circulatory systems. Can function as both digestive system and circulatory. Fluid bathes both inner and outer tissue layers exchanging gases and cellular waste. Open circulatory-allows blood and fluid to mix with each other. Branch into arterioles which carry blood to capillaries. Capillaries form into venules which form into veins that carry blood back to the heart. Pulmonary circuit-one pump (right) delivers o2 poor blood to capillary beds where o2 into the blood and co2 out of the blood. Systemic circuit-oxygen-rich blood enters left side of heart into capillary beds of organs and tissues throughout body, now o2-poor blood returns to heart. Reptiles (turtles, snakes, lizards)-incomplete septum divides the ventricles. >capillaries of head and forelimbs->cap of legs/abdominal organs->sup & inf vena cava->right atrium. Where aorta leaves the heart and pulmonary artery leaves the heart: atrial/ventricular diastole, atrial systole and ventricular diastole, ventricular systole and atrial diastole.
