P.E

• Cartilage - exercise causes cartilage to become thicker so our joints move smoothly
• Compact allows us to be better protected against impact injuries
• Marro cavity this produces red and white blood cells more blood cells means more blood and more oxygen can be carried around the body
• Periosteum is the lay down bone cells so that the bone grows in width
• Sponge bone is made of calcium salts and fiber
• Flexion - bend at a joint
• Extension - movement that increases the angles between two bones/straightening at a joint
• Addiction - movement towards the mid line of the body
• Abduction - movement away from the mid line
• Rotation - movement around an axis