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What forces the blood to circulate through vessels in a closed circulatory system? a. the notochord b. the nerve cord c. the cranium d. the heart

What forces the blood to circulate through vessels in a closed circulatory system? a. the notochord b. the nerve cord c. the cranium d. the heart
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2 votes
What forces the blood to circulate through vessels in a closed circulatory system?

a.
the notochord

b.
the nerve cord

c.
the cranium

d.
the heart

User Sven Nilsson
by
8.7k points

2 Answers

0 votes

Answer:

the heart, i took the quiz

User Marcus Stade
by
7.8k points
5 votes

Answer:

a.

Step-by-step explanation:

User HLGEM
by
8.9k points
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