Module 4: Problem Set - Part 1 Study Guide Rated A+

What are the three branches off the aortic arch? {Ans: Brachiocephalic trunk (right), left common carotid, left subclavian}True or false: Only arteries contain a tunica media. {Ans: False- all vessels contain three layers but in differing proportions.}What is unique about the Circle of Willis? {Ans: The Circle of Willis has a unique feature of providing alternate circulation in case one of the arteries becomes blocked.}What is the purpose of veins? {Ans: Veins carry blood back to the heart.}What does compliance mean? {Ans: Stretch with little recoil.}Label all major branches to/from the heart. {Ans: }Capillaries are interconnected to form _____________. {Ans: Capillary beds}What is the purpose of the fossa ovalis in a fetus? {Ans: It allows fetal blood to move directly from right to left atrium, bypassing he undeveloped lungs. The fossa ovalis closes during birth so that the lungs can receive oxygen once the baby is born.}What is the purpose of the mitral valve? {Ans: The mitral valve (bicuspid) controls the flow of blood from the left atrium into the left ventricle.}Label all heart chambers and valves. {Ans: }T or F: The tough, thick sac that encloses the heart and