The middle layer of the wall of an artery or vein is made up of
A) valves.
B) skeletal muscle.
C) smooth muscle.
D) endothelium.
E) simple squamous epithelial cells.
Correct Answer:
Verified
Q7: Vertebrates with a three-chambered heart include
A) fish.
B)
Q11: The large vessels that carry blood to
Q12: The tough connective tissue sac surrounding the
Q15: The simplest animals with a closed circulatory
Q18: Vertebrates with a four-chambered heart include
A) fish.
B)
Q19: The capillary wall consists only of
A) a
Q20: A patient has a problem with semilunar
Q21: The narrowing of blood vessels is
A) vasoconstriction.
B)
Q22: Diastolic pressure reflects the
A) contraction of the
Q35: A heartbeat begins in the
A) atrioventricular valve.
B)
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