How many bones are present in our arms?

Options

A. 32
B. 60
C. 45
D. 25

Answer

To determine how many bones are present in our arms, we can break it down step by step:

1. **Identify the bones in one arm**:
- The first bone is the **humerus**. This is a single bone in the upper arm.
- The second bone is the **radius**. This is also a single bone located in the forearm.
- The third bone is the **ulna**. This is another single bone in the forearm.
- Next, we have the **carpals**. There are **8 carpal bones** in the wrist.
- Following that, we have the **metacarpals**. There are **5 metacarpal bones** in the hand.
- Finally, we have the **phalanges**. There are **14 phalanges** in the fingers (3 for each finger and 2 for the thumb).

2. **Calculate the total number of bones in one arm**:
- Adding these together:
- Humerus: 1
- Radius: 1
- Ulna: 1
- Carpals: 8
- Metacarpals: 5
- Phalanges: 14
- Total for one arm = 1 + 1 + 1 + 8 + 5 + 14 = **30 bones**.

3. **Calculate the total number of bones in both arms**:
- Since humans have **two arms**, we multiply the total number of bones in one arm by 2:
- Total for two arms = 30 bones x 2 = **60 bones**.

4. **Conclusion**:
- Therefore, the total number of bones present in our arms is **60**.