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

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.

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

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

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

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

Joints Hinge  

Joints Ball and Socket

Joints Hinge Joint

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

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

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

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

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

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