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
- 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.
- This is achieved by the action of opposing (antagonistic…