How many vertebra-chondral ribs are present in the humen ?

Options

A. 7 pairs
B. 2 pairs
C. 3 pairs
D. 12 pairs

Answer

To determine how many vertebral chondral ribs are present in humans, follow these steps:

### Step-by-Step Solution:

1. **Understand the Terminology**:
- Vertebral chondral ribs are the ribs that are attached to the vertebral column and have cartilage connections to the sternum.

2. **Identify the Total Number of Ribs**:
- Humans typically have 12 pairs of ribs, which totals 24 individual ribs.

3. **Classify the Ribs**:
- Ribs are classified into three categories: true ribs, false ribs, and floating ribs.
- True ribs (first 7 pairs) directly attach to the sternum.
- False ribs (next 3 pairs) do not attach directly to the sternum but are connected via cartilage.
- Floating ribs (last 2 pairs) do not attach to the sternum at all.

4. **Determine the Number of Vertebral Chondral Ribs**:
- The vertebral chondral ribs are essentially the false ribs, which are the 8th, 9th, and 10th pairs of ribs.
- Therefore, there are 3 pairs of vertebral chondral ribs.

5. **Conclusion**:
- The total number of vertebral chondral ribs in humans is 3 pairs.

### Final Answer:
There are 3 pairs of vertebral chondral ribs present in humans.

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