1. Chapter 16 Body Systems
16-1 Skeletal System

2. Skeletal System
Made up of:
Bones
Joints
Connective Tissue

3. BONES Bones 206 bones in your body
They are storage systems for minerals (Calcium,Phosphorus)
They produce the bodies blood cells
Marrow: A soft tissue in the center of some bones
Makes millions of RBC every day.

4. Cranium
Mandible

5. Left Hand

6. Left Hand

7. Right Foot

9. JOINTS Joint: The point at which two bones meet. Some do not move
The bones of the skull
Some move slightly
Those between the vertebrae of the back
Some move a lot: they are called mobile joints.

10. JOINTS
Mobile Joints
Hinge Joint: They allow movement in one direction.
Knees and elbows
Gliding Joint: They help bones slide over each other without twisting.
Wrists, ankles
Pivot Joints: They allow movement with limited rotation.
Found between the neck and head
Ball and Socket Joint: They allow complete rotation to move in all directions.
Hips and Shoulders

11. CONNECTIVE TISSUE
Cartilage: a strong flexible, gel like tissue that cushions your joints.
It reduces the friction during movement and is important in your shoulders, elbows, and knees.
Tendons: tough bands of tissue that attach muscles to bones.
Ligaments: cord-like tissue that attach your bone to bone or cartilage.

14. Problems that may occur with your skeletal system
Fracture: a break in a bone caused by an injury.
Dislocation: occurs when a bone is pushed out of it’s joint.
Sprain: a stretching or twisting of ligaments in a joint.
Overuse injuries: an injury that happens over time.
Shin Splints
Scoliosis: a disorder in which the spine curves to one side.
Osteoporosis: a condition characterized by brittle and porous bones. It develops from long term deficiencies of calcium, certain hormones, insufficient Vitamin D, and lack of exercise.
Strain: an injury to a muscle or tendon. (Not skeletal injury)