A) 10
B) 10 pairs
C) 12 pairs
D) 24 pairs
Correct Answer: C
Solution :
In Pheretima the ring vessels are characteristic circular vessels of stomach situated within its 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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