Locomotion And Movement Ques 15
15. Out of ’ $X$ ’ pairs of ribs in humans only ’ $Y$ ’ pairs are true ribs. Select the option that correctly represents values of $X$ and $Y$ and provides their explanation:
[2017]
(a) $X=12, Y=5 \quad$ True ribs are attached dorsally to vertebral column and sternum on the two ends.
(b) $X=24, Y=7 \quad$ True ribs are dorsally attached to vertebral column but are free on ventral side.
(c) $X=24, Y=12$ True ribs are dorsally attached to vertebral column but are free on ventral side.
(d) $X=12, Y=7 \quad$ True ribs are attached dorsally to vertebral column and ventrally to the sternum.
Show Answer
Answer : d
Hints & Solutions
(d) In human, 12 pairs of ribs are present out of which 7 pairs of ribs (1st to 7 th pair) are dorsally attached to vertebral column and ventrally to the sternum.
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