Joints

Question 1

Ball & Socket Joints

Answer 1

In this type of joint the ball of one joint fits into the cup or socket of another. The ball & socket joint allows more movement that any other type of joint. Examples of ball & socket joints include the shoulder and hip joints.

Question 2

Hinge Joints

Answer 2

In a hinge joint, the convex surface of one bone fits into the concave surface of another. This only allows movement through one plane (eg forward/back OR left/right). Examples of hinge joints are the knee, elbow & knuckles.

Question 3

Gliding Joints

Answer 3

In a gliding joint the bone surfaces are almost flat and only a slight gliding movement can occur. Even though the movement is only small, when a number of gliding joints work together they produce significant movement. Examples of gliding joints include the joints between the vertebrae of the spine, the carpal (wrist) & tarsal (ankle) bones.

Question 4

Pivot Joints

Answer 4

In a pivot joint, the ring-like structure of a bone fits around the pivot-like structure of another bone. This type of joint therefore only allows for rotational movement. Examples of pivot joints include the radio-ulna joint just below the elbow (allowing rotation of the forearm), and the joint between the first and second cervical vertebrae (allowing rotation of the head).

Question 5

Types of Joints
-Synovial

Answer 5

bones separated by a fluid-filled joint cavity; free movement eg. all joints of the limbs

Question 6

Types of Joints
-Cartilaginous

Answer 6

bones joined by cartilage; small amount of movement eg. ribs attaching to sternum

Question 7

Types of Joints
-Fibrous

Answer 7

bones joined by fibrous tissue; no possible movement eg. bones of the skull