Answers Biology - SC3209 IC The Immune System — Unit testQuestion 4

4

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The Immune System — Unit test

Question 4 • Biology - SC3209 IC

Veins take blood back to the heart. Which gas would be most abundant in a vein that takes blood from muscle cells in the arm back to the heart?

Answer

A

carbon dioxide

B

oxygen

C

nitrogen

D

hydrogen

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Unit Test

Veins take blood back to the heart. Which gas…