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→Physiology
*'''Spine''': The spine or vertebral column consists of 26 irregularly shaped bones divided into 5 parts: the ''cervical, thoracic, lumbar, sacral and coccygeal.'' The spinal cord functions as an internal processing duct, as well as being the individual's pillar of balance and flexibility. The spinal column contains and regulates the balance of humours, as well as regulates chemical and electro-traffic within the whole body.{{Fn|22}}
'''[[Wikipedia:Joint|Joints]]''' are where two bones come together (apposition) to form articulation. This afford the human form the ability for movement and perambulation. The bones are held together by [[Wikipedia:ligaments|ligaments]], and movement is aided by [[Wikipedia:cartilage|cartilage]] and a secreted lubricant ([[Wikipedia:synovial fluid|synovial fluid]]). Classification of joints are as follows:{{Fn|22}}
*'''Fixed''': (''sutures'') allow no movement.{{Fn|22}}
*'''Gliding''': (wrists) are when bones move a little by sliding over each other.{{Fn|22}}
'''[[Wikipedia:Muscle|Muscles]]''' provide movement. Their appearance is like lean meat and their function is the same as a piston. They make up 50% of a human's body weight. The brain commands the muscles to move and the skeleton and joints follow their directional pulls. Regular exercise will increase muscle mass, thus increasing strength.{{Fn|22}}
===Human Civilisations===