Skeletal System Mr Royer Skeletal System A system

Skeletal System Mr. Royer

Skeletal System A system made up of bones (206), joints (5 types), and connective tissue (3 types)

Functions of Skeletal System 1. Movement- bones provide points of attachment for muscles 2. Support- Give our body shape and structure 3. Protection- our skull and ribs protect the brain and internal organs 4. Blood cell production-white and red blood cells are produced in the bone marrow of the long bones 5. Storage of minerals-calcium and

Types of Bones 1. 2. 3. 4. 5. Long Bone=Femur Short Bone=Fingers, Toes Flat Bone=Ribs, Sternum Irregular Bone=vertebrae Sessamoid Bone=Patella

Types of Joints Ø Ball and Socket- shoulder and hip allows most movement Ø Hinge- Knee and elbow Ø Pivot- Neck Ø Saddle- Hand wrist Ø Immovable or Suture- Skull

Connective Tissue Ligament- connect bone to bone Tendon- connects muscle to bone Cartilage- cushions joints

The Spinal Column The main function of the spine is to protect the spinal cord The spinal column consists of 3 main areas: 1. Cervical spine – the neck- has 7 vertebrae 2. Thorasic spine-the upper back-has 12 vertebrae 3. Lumbar spine- the lower back-has 5 vertebrae

Other Skeleton facts Ø Each hand has 27 bones Ø Our hands and feet together contain over half of the bones in or body Ø Pound for pound bones are stronger than steel

Skeletal System Problems q. Fracture- a break in a bone q. Dislocation- when a bone pops or moves out of place q. Osteoporosis- bones become brittle or weak, bone density decreases q. Arthritis- joints are painful and inflamed q. Sprain-the ligaments are stretched or torn