Number of bones in human axial skeleton is

Options

A. 80
B. 100
C. 106
D. 126 .

Answer

To determine the number of bones in the human axial skeleton, we can follow these steps:

### Step 1: Understand the Components of the Axial Skeleton
The axial skeleton consists of several key components:
- Skull
- Vertebral column
- Sternum
- Ribs

### Step 2: Count the Bones in Each Component
1. **Skull**:
- Total bones in the skull: 29
- Cranial bones: 8
- Facial bones: 14
- Associated bones: 7 (6 auditory ossicles + 1 hyoid bone)

2. **Thorax**:
- Total bones in the thorax: 25
- Sternum: 1
- Ribs: 24

3. **Vertebral Column**:
- Total bones in the vertebral column: 26
- 24 vertebrae + sacrum (5 fused vertebrae) + coccyx (4 fused vertebrae)

### Step 3: Add the Bones Together
Now, we can sum up the bones from each component:
- Skull: 29 bones
- Thorax: 25 bones
- Vertebral Column: 26 bones

Total = 29 (skull) + 25 (thorax) + 26 (vertebral column) = 80 bones

### Conclusion
The total number of bones in the human axial skeleton is **80**.

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