Types of Joints

Ball and Socket Structure A bone with a round end fits in a cup-shaped socket that does not move

Ball and Socket Movement Produced Circular Nearly 3600 Allow twisting and turning movement

Ball and Socket Examples Hip Shoulder

Hinge Structure One bone has an outwardly curved surface and the other bone has an inwardly curved surface

Hinge Movement Produced Two opposite directions such as back and forth Up and down nearly 900 Allow parts to bend and straighten

Hinge Examples Elbow Knee

Gliding Structure The surfaces of the bones that touch are flat

Gliding Movement Produced Bones move back and forth or side to side

Gliding Examples Wrist Ankles

Pivot Structure Rounded end of one bone passes through a hole in another

Pivot Movement Produced Allows twisting

Pivot Examples Head on neck

What are Ligaments? Fibrous bands of connective tissue linking two or more bones, cartilages, or structures together, to form a joint.

5 functions of a skeleton Support –the body is kept in position by the muscles that attach to the skeleton. Protection –the flat bones protect the internal organs. Movement –provided by the joints

5 Functions of a Skeleton Production of Blood –blood cells are produced in the red bone marrow in the center of some bones, including the pelvis, ribs, vertebrae and sternum. The yellow bone marrow stores fat. Storage –Minerals are stored in the bone, mostly calcium and phosphorus