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12 votes
12 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 Jacob Archambault
by
2.6k points

2 Answers

18 votes
18 votes

Answer:

the heart, i took the quiz

User Rohanharikr
by
2.6k points
21 votes
21 votes

Answer:

a.

Step-by-step explanation:

User Tinus Jackson
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3.1k points