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29 March, 14:36

Multiple Choice

Aclosed circulatory system is one in which

O

A. blood spreads freely throughout all of the body's tissues and organs.

0

B. blood flows through a system of blood vessels throughout the body,

Cblood travels through blood vessels into cavities called sinuses.

D. blood is pumped through a system of blood vessels and air sacs.

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Answers (1)
  1. 29 March, 14:57
    0
    The right answer is B).
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