NEET 2017 Zoology Skeletal System MCQ Question
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.
X = 12, Y = 7 True ribs are attached dorsally to vertebral column and ventrally to the sternum.
X = 12, Y = 5 True ribs are attached dorsally to vertebral column and sternum on the two ends.
X = 24, Y = 12 True ribs are dorsally attached to vertebral column but are free on ventral side.
X = 24, Y = 2 True ribs are dorsally attached to vertebral column but are free on ventral side.
Correct Answer
Detailed Explanation
Humans have 12 pairs of ribs, of which the first 7 pairs are true ribs. They are attached to the vertebral column at the back and to the sternum at the front.
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