Which one of the following is a characteristic of open circulatory systems but not closed circulatory systems?
A) a heart
B) a vascular system
C) blood
D) open-ended blood vessels
Correct Answer:
Verified
Q2: Which of these animals has a double
Q9: Why is blood pressure higher during systole
Q10: Blood pressure is lowest in _.
A)veins
B)capillaries
C)arterioles
D)venules
Q14: Which of the following can cause anemia?
A)
Q17: Which blood vessels have thin,leaky walls?
A)capillaries
B)venules
C)arteries
D)none of
Q21: Leukemia _.
A)decreases the production of white blood
Q22: In the human respiratory system, gas exchange
Q23: Oxygen is mostly transported through the body
Q24: When you hold your breath,which of the
Q34: White blood cells play a particularly important
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