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  4. Out of the 12 pairs of ribs in rib cage of human, how many ribs are true and false, respectively?

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Q. Out of the 12 pairs of ribs in rib cage of human, how many ribs are true and false, respectively?

NTA AbhyasNTA Abhyas 2022

Solution:

Ribs are of 3 types:
$1.$ True ribs (first 7 pairs): Dorsally attached to the thoracic vertebrae and ventrally connected to the sternum with the help of hyaline cartilage.
$2.$ Vertebrochondral or False ribs (8th, 9th and 10th pairs): These ribs do not articulate directly with the sternum but join the 7th rib with the help of hyaline cartilage.
$3.$ Floating ribs (11th and 12th pairs): These ribs are not connected ventrally.