Skeletal

• Functions of the Skeletal System

  • Support
  • Protection
  • Movement
  • Mineral deposits
  • Energy deposits
  • Hematopoiesis
• Long bones


  Slender bones, found in the limbs
• Short bones


  Cube shaped, wrist and ankle
• Flat bones


  Thin; sternum, scapulae, ribs, skull
• Irregular bones


  Vertebrae, hip bones
• Upper extremity

  1. Scapula
  2. Clavicle
  3. Humerus
  4. Radius
  5. Ulna
  6. Carpal
  7. Metacarpal
  8. Phalanges
• Lower extremity

  1. Hipbone
  2. Femur
  3. Tibia
  4. Fibula
  5. Patella
  6. Tarsals
  7. Metatarsals
  8. Phalanges
• Male pelvis characteristics

  • Heavy, thick
  • Deep false pelvis
  • Smaller, heart-shaped inlet
  • Large acetabulum facing laterally
  • Round obturator foramen
  • Acute pelvic angle
• Female pelvis characteristics

  • Light, thin
  • Shallow false pelvis
  • Larger, oval-shaped inlet
  • Small acetabulum facing laterally
  • Oval obturator foramen
  • Obtuse pelvic angle
• Synarthotic


  im movable
• Amphiarthrotic


  slightly movable
• Diarthrotic


  freely movable
• Fibrous joints


  ex: Skull sutures, Intersseous membrane

  • Two bones held closely together by fibrous connective tissue
  • Amphi- (little) / Syn- (no) arthrotic
• Cartilaginous joints


  ex: Growth plate, pubic symphysis, intervertebral discs

  • Bones held together by cartilage
  • Little (amphi) / No (syn) movement
• Synovial joints


  ex: Pelvic-humerus joint

  • Synovial cavity allows the joint to be diarthrotic
  • Synovial fluid secreted by the synovial membrane forms a film that lubricates the cartilage