1. System made of bones, cartilage, and connective tissue.
Skeletal System
System made of bones, cartilage, and connective tissue.

2. Function of the Skeleton
Protection
Protects vital parts of your body such as lungs and spinal cord.
Storage
Store minerals and fat.
Movement
Skeletal muscles pull on bones to produce movement.
Blood Cell Formation
Filled with marrow to create blood cells.

3. Interesting... Skull Protects the brain. Made of 30 bones Ribs
Protects the heart and lungs.
Vertebral Column
Protects the Spinal Cord
26 Vertebra
Femur
Largest bone in the body, accounts for 1/4 of your height

7. Bones Structure
Maintain homeostasis by storing minerals and making blood cells.
Two kinds of bone tissue
Compact
Rigid and dense
Spongy
Many open spaces and provides most of the strength and support for a bone
Marrow - Soft tissue in the bone
Red Marrow - Produces red and white blood cells
Yellow Marrow - Stores fat

8. Bone Growth
Cartilage - Soft flexible tissue, helps cushion the area in a joint where bones meet.
Bones replaces cartilage as your grow.

9. Joints Joint is where two or more bones meet.
Ligaments – strong elastic bands of connective tissue that connect the bones in a joint.
Types of joints
Gliding - Wrist and Hand
Ball and Socket Joint - Shoulder and Hips
Hinge - Knee

10. Joints
Hinge

11. Joints
Ball and Socket

12. Joints
Hinge Joint

13. Injuries and Diseases
Osteoporosis - Disease that causes bones to become less dense.
Arthritis - Disease that affects the joints where they swell and stiffen.

14. The organ system whose primary function is movement and flexibility.
Muscular System
The organ system whose primary function is movement and flexibility.

15. Kinds of Muscle Voluntary Muscle Under our control Involuntary Muscle
Not under our control
Three kinds of muscle
Skeletal Muscle
Enables bones to move
Smooth Muscle
Moves food through the digestive system
Cardiac Muscle
Pumps blood around the body

16. Movement Tendons Muscles work in pairs Attach muscles to your bones
Flexors – Bends part of your body
Ex. Bicep, Hamstring
Extensors – Straightens part of your body
Ex. Tricep, Quadricep

17. Use it or lose it Resistance Exercise – Increases skeletal muscle
Lifting weights
Aerobic Exercise – Increases heart strength and endurance.
Jogging

18. Muscle Injury Strain Tendinitis Anabolic Steroids
Injury in which a muscle or tendon is overstretched or torn
Tendinitis
Where tendons become strained
Anabolic Steroids
Can cause long term health problems