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25 December, 18:32

Which is not a characteristic of all circulatory systems?

A.

small, thin vessels called capillaries

B.

uses oxygen that ultimately comes from the surrounding environment

C.

carries oxygen to cells

D.

blood or blood-like fluid

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Answers (1)
  1. 25 December, 21:13
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    B. uses oxygen that ultimately comes from the surrounding environment - is not a characteristic of all circulatory systems. The oxygen in the blood comes from the respiratory system and cardiovascular system.
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