Elbow joint is an example of

Options

A. gliding joint
B. ball and socket joint
C. Pivot joint
D. Hinge joint

Answer

To determine what type of joint the elbow joint is, we can analyze the characteristics of different types of joints.

### Step-by-Step Solution:

1. **Understand the Types of Joints**:
- There are several types of joints in the human body, including gliding joints, ball and socket joints, pivot joints, and hinge joints. Each type allows for different types of movement.

2. **Identify Gliding Joints**:
- Gliding joints allow the bones to glide past one another in any direction along the plane of the joint. Examples include the bones of the wrist and ankle.

3. **Identify Ball and Socket Joints**:
- Ball and socket joints allow for multidirectional movement. An example is the shoulder joint, where the humerus fits into the glenoid cavity.

4. **Identify Pivot Joints**:
- Pivot joints allow for rotary movement around a single axis. An example is the atlas joint in the neck.

5. **Identify Hinge Joints**:
- Hinge joints are a type of synovial joint that allows for angular movement in one plane only. This means they can increase or decrease the angle between the bones. Examples include the knee joint and the elbow joint.

6. **Analyze the Elbow Joint**:
- The elbow joint allows for flexion and extension, which means it operates like a hinge joint. It allows movement in one plane, making it a classic example of a hinge joint.

7. **Conclusion**:
- Based on the characteristics and examples of each type of joint, we can conclude that the elbow joint is an example of a hinge joint.

### Final Answer:
The elbow joint is an example of a **hinge joint** (Option D).

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