Roles of Skeleton, synovial joints

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Roles of the human skeleton

  • Support-it holds us upright and provides a framework for tissures and organs.
  • Protection-the heart and lungs are protected by the rib-cage.
  • Movement-takes place when muscles move bones at joints.
  • Making blood cells-red and white blood cells are made inside the one marrow.
  • Creating minerals e.g. calcium

Synovial joints

  • A synovial joint occurs when two bones come together.
  • The points capsule manufactures the synocial fluid.
  • Ligaments connect bone to bone. They are elastic enough to allow one bone ot move relative to he other.
  • Tendons connect muscle to the bone.
  • The synovial fluid lubricates the joint; it acts as a shock absorber and feeds the living tissue of the joint.
  • Cartilage reduces friction between the bones and is a shock absorber. (There is extra cartilage in the knee for this reason). The ends of the bones are covered in cartilage.

Antagonistic muscles

  • This is achieved by the action of opposing (antagonistic…


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