Functions of the Skeleton

• Functions of the Skeleton - Support

  bones provide a framework that supports the body + cradles its soft organs

  e.g. bones of lower limbs act as pillars to support the body trunk when we stand

  the rib cage supports the thoracic wall
• Functions of The Skeleton - Protection


  the fused bones of the skull protect the brain

  the vertebrae surround the spinal cage

  the rib cage helps protect the vital organs of the thorax
• Functions of the Skeleton - Anchorage


  skeletal muscles, which attach to bones by tendons, use bones as levers to move the body + its parts -- ability to walk, grab objects + breathe

  the design of joints determines the types of movements possible
• Functions of the Skeleton - Mineral Storage


  bones = reservoir for minerals, most importantly calcium + phosphate

  the stored minerals r released into the bloodstream in their ionic form as needed for distribution to all parts of the body
• Functions of the Skeleton - Blood Cell Formation


  most blood cell formation (haemotopoiesis) occurs in the red marrow of certain bones
• Functions of the Skeleton - Triglyceride Storage


  fat = energy source for the body = stored as yellow marrow in the cavities of long bones
• Functions of the Skeleton - Hormone Production


  bones produce osteocalcin = hormone that helps to regulate insulin secretion, glucose homeostasis + energy expenditure