The number of vertebrochondral ribs in human is

Options

A. 2
B. 4
C. 6
D. 14

Answer

To determine the number of vertebrochondral ribs in humans, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Classification of Ribs**:
- Human ribs are classified into three categories: true ribs, false ribs (vertebrochondral ribs), and floating ribs.

2. **Identify True Ribs**:
- True ribs are the first seven pairs of ribs (1st to 7th pairs). These ribs attach directly to the sternum.

3. **Identify False Ribs (Vertebrochondral Ribs)**:
- The false ribs, also known as vertebrochondral ribs, consist of the 8th, 9th, and 10th pairs of ribs. These ribs do not attach directly to the sternum but are connected to it indirectly through cartilage.

4. **Identify Floating Ribs**:
- The 11th and 12th pairs of ribs are classified as floating ribs, which do not attach to the sternum at all.

5. **Count the Vertebrochondral Ribs**:
- Since the vertebrochondral ribs are specifically the 8th, 9th, and 10th pairs, we can conclude that there are 3 pairs of vertebrochondral ribs.

6. **Calculate the Total Number**:
- Each pair of ribs consists of 2 ribs, so for the 3 pairs of vertebrochondral ribs, the total number is 3 pairs x 2 ribs/pair = 6 ribs.

### Final Answer:
The number of vertebrochondral ribs in humans is **6**.

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