JOINTS AND SKELETAL MOVEMENT

Question 1

• Also called articulation
• Point at which two or more bones meet.
• Responsible for movement, such as the movement of limbs, and stability, such as the stability found in the bones of the skull.

Answer 1

Joint

Question 2

JOINTS CLASSIFICATIONS

Answer 2

Based on structure
Based on function

Question 3

STRUCTURAL CLASSIFICATIONS

Answer 3

Fibrous
Cartilaginous
Synovial joints

Question 4

The bones of fibrous joints are held together by fibrous connective tissue. There is no cavity, or space, present between the bones, so most fibrous joints do not move at all, or are only capable of minor movements.

Answer 4

FIBROUS JOINTS

Question 5

FIBROUS JOINTS

Examples: joints between the bones in the skull and between the teeth, and the bone of their sockets.

Answer 5

FIBROUS JOINTS

Question 6

 Bones are connected by cartilage.
 Allow minimal movement (joints between vertebrae in the spine).

Answer 6

CARTILAGINOUS JOINTS

Question 7

 Have a fluid-filled joint cavity for lubrication. This fluid reduces friction, enhancing flexibility.

 Enable the greatest range of motion (e.g., knees, elbows, shoulders).

Answer 7

SYNOVIAL JOINTS

Question 8

MOVEMENTS OF SYNOVIAL JOINTS

 Flexion: Decreases the angle between bones (bending the
elbow).

 Extension: Increases the angle between bones (straightening the
elbow).

 Rotation: Bone moves around its axis (shaking head “no”).

Question 9

Decreases the angle between bones (bending the elbow).

Answer 9

FLEXION (Movements of Synovial Joints)

Question 10

Increases the angle between bones (straightening the elbow).

Answer 10

EXTENSION (Movements of Synovial Joints)

Question 11

Bone moves around its axis (shaking head “no”).

Answer 11

ROTATION (Movements of Synovial Joints)