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1. The heart has four that are enclosed by thick, muscular walls.
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5 votes
1. The heart has four
that are enclosed by thick, muscular walls.

User Thegaram
by
7.7k points

1 Answer

4 votes

Answer:

The heart has four

VALVES that are enclosed by thick, muscular walls.

User Ptkoz
by
8.4k points
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