Number of ball and socket joints present in human body is

Options

A. 2
B. 4
C. 6
D. 8 .

Answer

To determine the number of ball and socket joints present in the human body, follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Ball and Socket Joints**:
- A ball and socket joint consists of a spherical (ball-shaped) end of one bone that fits into a cup-like (socket) cavity of another bone. This structure allows for a wide range of movement.

2. **Identify the Locations of Ball and Socket Joints**:
- In the human body, the primary ball and socket joints are located in the hips and shoulders.

3. **Count the Ball and Socket Joints in the Hips**:
- There are two hip joints, one on each side of the body. Each hip joint is formed by the round head of the femur fitting into the acetabulum of the pelvic girdle.

4. **Count the Ball and Socket Joints in the Shoulders**:
- Similarly, there are two shoulder joints, one on each side of the body. Each shoulder joint is formed by the round head of the humerus fitting into the glenoid cavity of the scapula (shoulder blade).

5. **Calculate the Total Number of Ball and Socket Joints**:
- Adding the joints together: 2 (hips) + 2 (shoulders) = 4 ball and socket joints in total.

6. **Select the Correct Answer**:
- The question asks for the total number of ball and socket joints, which is 4. Therefore, the correct answer is option B (4).

### Final Answer:
The number of ball and socket joints present in the human body is **4**.

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