c. lack valves.
Biology, 09.04.2021 18:50 briannabridgewater01
4. Compared with the walls of arteries, the walls of veins
a. are thicker.
c. lack valves.
b. are thinner.
d. have more resistance.
Answers: 1
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4. Compared with the walls of arteries, the walls of veins
a. are thicker.
c. lack valves.
c. lack valves.
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