1. Skeletal System

2. The Skeletal System
Bones are hard, white, and mainly composed of a mineral compound called calcium phosphate.
Organs: the organs of the skeletal system are: BONES and JOINTS

3. 4 Functions of the Skeletal System
Protection: Bones protect the organs of the body. (ex. Brain, lungs, and heart) and hold organs in place
2. Contains and Makes Blood Cells: Red and white blood cells are formed by tissue called marrow, which is in the center of the bone.

4. 4 Functions of the Skeletal System
3. Support: Provides support for the body and the muscles.
Muscle attached to bones!!

5. 4 Functions of the Skeletal System
4. Storage: Bones store minerals, such as calcium and phosphorus, for use by the body

6. Various Bone Functions
Backbone: Provides structure, which allows the body to stand up straight.
Skull: Acts as a hard, safety helmet to protect the brain.

7. Various Bone Functions
Vertebrae: surrounds the spinal cord.
Rib Cage: Protects the heart and lungs.

8. Joints of the Skeletal System
Six basic joints
1. Ball and Socket
Hinge
Pivot
Saddle
Gliding
Immovable

9. Joints cont. Ball and Socket: -Located at the shoulder and the hips
Hinge: work like a door hinge, they are located at the knee, elbow, and fingers.

10. Joints of the Body
Ball and Socket Joint: Round end of bone fitting snuggly within another bone.
Ex. Shoulder and Hip

11. Joints of the Body
Hinge Joint: Movement at joint in one direction like a door.
Ex. Knee and Elbow

12. Joints cont.
Pivot Joints: found in the neck and the two bones of the lower arm.
Saddle Joints: found at the base of the thumb

13. Joints of the Body
Pivot Joint: Bone resting atop another bone permitting free movement.
Ex. Neck, Wrist and Ankles

14. Joints cont. Gliding: found between the bones of the hands and feet.
Immovable: found in the skull and the pelvis.

15. Joints of the Body Fixed Immovable: Joint does not move
Ex. Skull
Gliding Joint: Bones slipping over other bones with a free flowing movement.
Ex. Knuckles

16. Pelvis (Dancing Bone)

17. Femur (Largest Bone in the Body)

18. Problems of the Skeletal System
Fracture: Break
Dislocation: Out of joint

19. Problems of the Skeletal System
Sprain: Swelling in the joint
Arthritis: Inflamed and stiff joints

20. Problems of the Skeletal System!!
Scoliosis: Curvature of the spine
Osteoporosis: Brittle bones