SKELETAL SYSTEM for dummies RED= Important BLACK = Write Down BLUE = Don’t write down SKELETAL SYSTEM for dummies pp 911-916

FUNCTION Bones support muscles and organs produce red and white blood cells gives shape and structure to the body protects internal organs store minerals

SKELETON Axial –the skull, face, vertebral column, and rib cage. Appendicular –the arms and legs, pelvis, scapula, collar bone, etc bones and their associated tissues (cartilage and ligaments) make up the skeletal system to support the body

BONE STRUCTURE porous and made of proteins and minerals osteocytes –cells that make bone bone marrow – soft bone tissue that produces platelets and blood cells

BONE DEVELOPMENT develop from cartilage (tough flexible connective tissue) ossification: hardening of bone cartilage elongation at the end of bones

JOINTS place where two bones meet

Fixed: no movement between bones (ex. skull). Semimovable: limited movement (i.e. rib cage and vertebrae) Movable 1. hinge – knee and knuckle 2. pivot – skull joins the vertebral column 3. ball-and-socket – hip 4. gliding – wrist and ankle (slide over one another)

JOINT STRUCTURE cartilage between joints for cushion ligaments connect joints (bone to bone)