skeletal system

• skeletal system: body's hard structure
• bone - a living tissue that makes up the bone

  • site of blood cels and manufacturing
  • made up of protein, collagen, minerals (calcium)
• collagen - hardens and strengthens the bones
• connective tissues in ss: cartilage, tendons, ligaments
• three regions: head region, mid-body region, lower body region
• mid-body section: contains the circulatory, respiratory, and digestive system
• mandible - largest and strongest bone in the face
• lacrimal apparatus - secretes tears
• zygomatic bone - cheek bone
• temporal bone - forms the sides and the base of the face

  protest the tempral lobe
• clavicle - connects shoulder to the rest of the ss
• scapula - where humerus fits into
• sternum - protects the heart, lungs, other vital organs
• ribs - protects heart and lungc
• spinal cord - acts as a pathway for messages between the brain and the body

  • supports the ss as a whole
• pelvis - supports upper body weight, pelvic organs
• sacrum -
• carpal - facilitates up, down, and rotation of wrist
• metacarpal - concave arc in the palm

  • accommodates the muscle, tendons, and nerves
• phalanges - gripping and holding objects
• patella - knee cap
• tibia - stabilizes us as we move
• fibula - supports lower leg and ankle
• metatarsals - helps with foot arches (convex)
• clavicle - collar bone