Q.

The human ribs are called bicephalic because

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a

they have two articulation surfaces on their ventral end

b

they have two articulation surfaces on their ventral end and two on dorsal end

c

they have two articulation surfaces on their dorsal end

d

they have one articulation surfaces on their ventral end and one on dorsal end

answer is B.

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Detailed Solution

Each rib is a thin flat bone connected dorsally to the vertebral column and ventrally to the sternum.
It has two articulation surfaces on its dorsal end and is hence called bicephalic.

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