Subject: General Science
Book: NCERT Science Class 6
The human body can move in different ways due to joints, muscles, and bones.
- **Types of Joints**:
1. Ball-and-socket joint: Found in shoulders and hips, allowing movement in all directions.
2. Hinge joint: Found in elbows and knees, allowing movement in one direction.
3. Pivot joint: Found in the neck, allowing rotation.
4. Fixed joint: Found in the skull, preventing movement.
- **How Do Muscles Work?**: Muscles work in pairs; when one contracts, the other relaxes.
**Possible Exam Questions:**
1. What are the different types of joints in the human body?
2. Explain how muscles help in movement.
3. How is the structure of the ball-and-socket joint different from the hinge joint?
4. Why can’t we move our skull bones?
5. Discuss the importance of bones and joints in movement.
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