Skeletal System

Question

The number of floating ribs in humans is:

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1. **Rib Classification**: Humans have 12 pairs of ribs.
2. **True Ribs**: First 7 pairs ($1^{st}$-$7^{th}$) attached directly to the sternum.
3. **Vertebrochondral Ribs**: $8^{th}$, $9^{th}$, and $10^{th}$ pairs attached to the $7^{th}$ rib.
4. **Floating Ribs**: The last two pairs (**$11^{th}$ and $12^{th}$**) are not attached ventrally at all.
5. **Conclusion**: There are **2 pairs** of floating ribs.

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Skeletal System

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