Joint structures and joint actions

From Pdhpe Magdalene

The place where two bones meet together is called a joint or an articulation.

Different joints allow a different degree of movement.

There are three major types of joints:

FIBROUS JOINT

Diagram below:

Image retrieved from: http://www.arrowvale.worcs.sch.uk

Bone ends are joined by strong, fibrous tissue called sutures.

There is no possible movement.

E.g. within the skull and pelvis.

CARTILAGINOUS

Diargram below:

Image retrieved from: http://www.shoppingtrolley.net/images/anatomy/

Cartilage discs lie within bone ends.

Theses discs perform as shock aborbers.

Slight movement is possible.

E.g. Between the spinal vertebrate.

SYNOVIAL JOINT

Diagram below:

Image retrieved from: http://ovrt.nist.gov

The surface of the two bones slide over each other easily.

Free movement is possile.

E.g. Elbow, shoulder, knee (most common type of joint in the body)