Chp.8 skeletal and muscular systems

parts of human skeleton
1. diagram
2. do not need joints and stermum
3. missing collar bone/shoulder blade
functions of skeleton
1. support
2. provides rigid base against which muscles pull on
3. protection
types of joints
1. fixed/fused joint
  1. no movement allowed
    1. bone in skull
2. freely moving joints(synovial joints)
  1. ball and socket
    1. movement in all directions
      1. shoulder/hip
  2. hinge
    1. movement in one direction only
      1. elbow/knee
  3. cartilage covers ends of bones
    1. produce lubricating liquid(synovial fluid)
cartilage,tendons,ligaments
1. cartilage
  1. covers and protects ends of bones
2. tendons
  1. connect muscles to bone
3. ligaments
  1. connect bones to bones
muscles
1. made of protien
2. can only contract(get shorter)
3. work in antagnostic pairs(opposite pairs)
antagonistic pair of muscles
1. biceps and triceps are antagonistic
  1. triceps contract to lower forearm
    1. biceps contract to raice forearm

Resumo de Recurso

	Criado por nkeely14 mais de 10 anos atrás