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Circulatory systems
Higher
2 marks
State two advantages of a double circulatory system over a single one.
A
Higher blood pressure to body tissues; oxygenated and deoxygenated blood kept separate
B
Simpler heart structure; less energy required to pump blood
C
Blood never needs to pass through the lungs
D
Allows two-way flow in all blood vessels
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Circulatory systems — Biology (0610) | Smartzi