Roles of Skeleton, synovial joints

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…