The Skeletal System

5 Functions of the Skeletal System: Shape and Support Movement Protection of internal organs Production of blood cells Storage of vitamins & minerals

The backbone or vertebral column is the center of the skeleton.

The backbone is made up of 26 small bones called vertebrae.

Parts of the Bone Compact Bone Spongy Bone Bone Marrow Peristeum (Outer Membrane)

The spaces in bone contain a soft connective tissue called marrow. The job of the bone marrow is to make blood cells.

Cartilage connective tissue that is more flexible than bone.

Joints places in the body where two bones come together.

Immovable joints connect bones in a way that allow little or no movement.

Moveable joints allow the body to make a wide range of movement.

There are 4 types of moveable joints: Ball-and-socket Hinge Gliding Pivot

Ball–and–Socket Joint allows the widest range of motion. shoulder and hip are examples.

Hinge Joint allows movement in one plane. knee and elbow are examples.

Gliding Joints provides sliding movement. ankle and wrist are examples.

Pivot Joints allows rotation. the neck is an example.

strong connective tissue that hold bones together Ligaments Note: ACL tear is a common injury for football and basketball players. Why ?

Osteoporosis is a condition in which the body’s bones become weak & break easily.