Question

These are the floating ribs in human rib cage

• A. $1^{st}$ pair to $7^{th}$ pair
• B. $8^{th}$ pair to $10^{th}$ pair
• C. $11^{th}$ pair and $12^{th}$ pair
• D. $6^{th}$ pair to $9^{th}$ pair

Hint:

Floating ribs protect the kidneys from behind.

Answer 1

The Correct Option is C

Step 1: Classification of Ribs:
There are 12 pairs of ribs in humans, classified based on their attachment to the sternum:

• True Ribs (Vertebrosternal): First 7 pairs ($1^{st}-7^{th}$). They attach directly to the sternum ventrally.
• False Ribs (Vertebrochondral): Next 3 pairs ($8^{th}, 9^{th}, 10^{th}$). They do not attach directly to the sternum but join the $7^{th}$ rib via hyaline cartilage.
• Floating Ribs (Vertebral): Last 2 pairs ($11^{th}$ and $12^{th}$). They are not connected to the sternum ventrally at all; they "float" in the abdominal muscles.

Step 2: Final Answer:
The floating ribs are the $11^{th}$ and $12^{th}$ pairs.