1.

How are joints classified? Explain with example.

Answer»

The point at which two separate bones meet is called a joint Depending on the type of movement they allow, joints can be of three types: fixed, slightly movable and movable joints.

1. Fitted or Immovable joints: 

In this type of joint, no movement is possible between the two bones. The structures between the bones of the skull box are examples of immovable joints.

2. Slightly movable joints: 

Only very little (partial) movement occurs between the two bones. The joint between a rib and the breast bone or between the vertebrae is the example for slightly movable joint.

3. Freely movable joints: 

In this type, varying degree of movements is possible between the two bones forming the joint. There are six major types of movable joints.

Condition: 

The different types of movable joints are:

JointExamples
Ball and SocketShoulder Hip
HingeElbow Knee Ankle
PivotSpine (Atlas / Axis joint at the top)
CondyloidWrist
GlidingSpine (between the bony processes of the vertebrae)
SaddleThumb, shoulder and inner ear.


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