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Jointsoftheskeleton

Jointsoftheskeleton

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JOINTS OF THE SKELETON

The joint or articulation is the junction between two or more

bones regardless of the actual movement it permits.

The joints of the body are classified according to the degree

and types of movements they perform.

1. Fibrous or Immovable

2. Cartilaginous or Slightly movable

3. Synovial or freely movable

TYPES OF JOINTS

Fibrous Joints- It is the type of joint where bones are

not movable. Here the connecting medium between the joints

is fibrous tissue.

The articulations of the skull bones are typical of the fibrous

joint, known as suture. Following are the examples of sutures;

• Coronal Suture that joins the frontal and parietal bones of

the skull.

• Lambdoid Suture that joins both the parietal bones with

the occipital bone of the skull.

• Saggital Suture is the joint between two parietal bones of

the skull.

Teeth in the socket is an example of peg and socket joint.

Tibio-Fibular joint (Synchodrosis) is also a type of fibrous joint.

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Cartilagenous Joints- It is the type of joints where the

bones are movable. The opposed surfaces are covered with the

hyaline cartilage and they are connected by the bands of white

fibrous ligaments or by disc of fibrous cartilage.

Following are the examples of cartilaginous joint;

• The joint between the manubrium sterni and the body of

the sternum.

• Pubic joint by which two pubic bones are joined together

in the pelvis.

• Intervertebral joints with fibrocartilage in between every

two vertebrae of the vertebral column.

• Temporary joints present between the diaphysis and

epiphysis of long bones.

Synovial Joints- It is the freely movable joint.

Characterstics of a Synovial joint are;

• The opposed bony surfaces are covered with an articular

cartilage. However these cartilages are not attached to each

other.

• There is a cavity around the joint called synovial cavity.

• The synovial cavity is surrounded by a ligament or capsule

• The cavity is filled with a fluid called synovial fluid which

lubricates joint.

• Synovial membrane covers all around the cavity.

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JOINTS OF THE SKELETON The joint or articulation is the junction between two or more bones regardless of the actual movement it permits. The joints of the body are classified according to the degree and types of movements they perform. 1. Fibrous or Immovable 2. Cartilaginous or Slightly movable 3. Synovial or freely movable TYPES OF JOINTS Fibrous Joints- It is the type of joint where bones are not movable. Here the connecting medium between the joints is fibrous tissue. The articulations of the skull bones are typical of the fibrous joint, known as suture. Following are the examples of sutures; • Coronal Suture that joins the frontal and parietal bones of the skull. • Lambdoid Suture that joins both the parietal bones with the occipital bone of the skull. • Saggital Suture is the joint between two parietal bones of the skull. Teeth in the socket is an example of peg and socket j ...
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