Apulmonaryartery bpulmonaryvein cvenacava

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Unformatted text preview: culatory systems; A) flat and circular B) open and closed C) transverse and repetitive D) single and double 15. Oxygen‐poor blood is carried from the heart of a mammal to the lungs via the; A) pulmonary artery B) pulmonary vein C) vena cava D) coronary artery 16. In mammals, which of following vessels transports oxygenated blood from the lung back to the heart? A) pulmonary artery B) pulmonary vein C) vena cava D) coronary vein 17. Which blood vessels have the thinnest walls? A) arterioles B) veins C) venules D) capillaries 18. As blood moves away from heart towards tissues, relative size of blood vessels _________, blood pressure ________, and the velocity of blood flow ________. A) decreases, drops, slows B) decreases, increases, increases C) decreases, drops, increases D) increases, drops, slows 19. The body's innate defense against infection include; A) several nonspecific antibodies B) barriers such as dead skin cells and mucus C) increased production of certain hormones and changes in microcirculation D) memory cells 20. Oxygen moves from blood into the interstitial fluid and then to body cells beca...
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