A) 10 pairs
B) 10 pairs
C) 12 pairs
D) 24 pairs
Correct Answer: C
Solution :
In Pheretima, the ring vessels are characteris circular vessels of stomach situated within muscular ceat. These are about 12 vessels per segment. Through these vessels, blood of lateral oesophageals reaches the supraoesophageal.You need to login to perform this action.
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