UNDERSTANDING JOINTS- ENGLISH

JOINTS IN ENGLISH

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JOINTS-

Joints are the places where 2 or more bones meet. 

CLASSIFICATION OF JOINTS

Joints are classified into three main types

Fixed joints

Slightly movable joints

Freely movable joints

Fixed joints- Most fibrous joints are also called "fixed" or "immovable" joints. These joints have no joint cavity and are connected via fibrous connective tissue. The skull bones are connected by fibrous joints called sutures.

Slightly movable joints-  A slightly movable joint is defined as an articulation between bones in which the motion is limited due to presence of  cartilage. So it is also known as cartilaginous joint.

Freely movable joints- These joints are capable of free movement. there is a synovial cavity between two ends of the bone. It is filled with synovial fluid. So theses joints are also called as synovial joints.

Synovial joints allow for smooth movements between the adjacent bones. The joint is surrounded by an articular capsule which is also known as synovial cavity filled with synovial fluid. The articulating surfaces of the bones are covered by a thin layer of smooth articular cartilage. Ligaments support the joint by holding the bones together and resisting excess or abnormal joint motions.

           Freely movable or synovial joints are further classified into –

Ø Ball and socket joint

Ø Hinge joint

Ø Pivot joint

Ø Plane joint

Ø Condyloid joint

Ø Saddle joint

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