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The Lonely Rash... from Kendriya Vidyalaya No.1 , asked a question
Subject: Biology , asked on 13/2/13

why ribs are called bicephalic?

EXPERT ANSWER

Krishnakoli Datta ,Meritnation Expert added an answer
Answered on 14/2/13

Ribs have two heads (articulation surfaces) on their both dorsal and ventral ends and that is way they are known as bicephalic.

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Sadia S , From International Indian School , added an answer
Answered on 14/2/13

becoz  it joins with vertebral column in dorsal axis n joins with strenum  in the ventral axia.. thus it is called  bicephalic