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Home Q & A Board Biology-Related Homework Help Zoology and Botany (Moderator: ehd123)
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Jermain_ Jermain_
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10 years ago

 
How does the dorsal blood vessel of the earthworm pump blood?   
A)
 
contractile skeletal muscle surrounding the vessel   
B)
 
peristalsis   
C)
 
contractile chamber   
D)
 
It doesn't pump blood. Blood flow is passive.   
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padrepadre
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10 years ago
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Jermain_ Author
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#2
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10 years ago
Excellent answer, thank you padre.
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