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earthworm possesses how many pairs of hearts
a  6
b  4
c  2
d  1

Dear Student,
 
Please find below the solution to the asked query:
Earthworm does not have any heart. They instead have a series of single-chambered organ called aortic arches which help to pump blood throughout the body. They have total five aortic arches. These aortic arches do not have any chambers or valves and they do not get supply of oxygenated blood from the lungs. Thus these are not true hearts. But these are considered as 8 (four in pairs).
 
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Earthworms do not have a multichambered heart like mammals or reptiles but instead have a series of single-chambered aortic arches, or "psuedohearts," that pump blood through the circulatory system. Some biologists argue that these structures are indeed hearts, but whether they can be considered true hearts or not, the average earthworm has five of these circulatory-system structures arranged consecutively.
  • 0
Hemalata palaria..

But i googled it n it was written that eathworm has 4 pairs of heart
  • -1
Yes, earthworm has 4 pairs of hearts but according to few web pages in google there are 5 aortic hearts in earthworms.
  • 1
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