Vertebrate blood vessels have complex walls.The smooth muscle of the __________ layer of the blood vessel causes vasoconstriction.
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Q39: Which of the following does NOT cause
Q40: In the mammalian heart,the valves open and
Q41: Hematopoiesis is the production of
A)blood cells.
B)blood vessels.
C)blood
Q42: Cardiac contraction is called _.
Q43: Total flow in the vertebrate circulatory system
Q45: What is edema?
A)accumulation of interstitial fluid in
Q46: Sponges do not have a true circulatory
Q47: The primary pump in chambered hearts is
Q48: Capillaries empty into _.
Q49: In the tetrapod circulatory system,the right side
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