Aztec Coin

sketchfab

The human body is a complex machine that operates on numerous systems working together to maintain life. The respiratory system takes in oxygen and expels carbon dioxide through breathing. The circulatory system transports nutrients and oxygen to cells throughout the body while also removing waste products. The nervous system, comprised of the brain and spinal cord, controls voluntary actions such as movement and sensation. The skeletal system provides structural support and protection for internal organs.