A Chapter 14: Blood Vessels & Blood Circulation

Question Answer
arteries carry blood away from the heart toward the tissues
arteroiles small subdivisions of the arteries; they divide into capillaries
capillaries tiny, thin-walled vessels that allow for exchanges between systems; connect the arteroiles and venules
venules small vessels that receive blood from the capillaries and begin its transport back toward the heart
veins vessels formed by the merger of venules; the continue blood's transport until it is returned to the heart
pulmonary circuit delivers blood to the lungs, where some carbon dioxide (CO2) is replenished
systemic circuit supplies nutrients and oxygen to all the tissues and carries waste materials away from the tissues for disposal
endothelium inner tunic; forms a smooth surface over which the blood flows easily
middle tunic thickest layer, smooth, involuntary muscle which is under control of the autonomic nervous system
outer tunic supporting connective tissue
aorta receives freshly oxygenated blood from the LT ventricle and then branches into the systemic arteries carrying blood to the tissues
ascending aorta extends upward and slightly to the right from the left ventricle; it lies within the pericardial sac
aortic arch curves from the right to the left and also extends posteriorly
thoracic aorta descends just anterior to the vertebral column posterior to the heart in the mediastinum
abdominal aorta longest section of the aorta; beginning at the diaphragm and spanning the abdominal cavity

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