The Human Body -

: Your lungs fill with air, pulling in oxygen and pushing out waste, while your stomach uses chemical baths to break down your last meal. The Sentinels

: Specialized structures like the heart , brain , and lungs that carry out complex tasks. The Human Body

Found in adipose tissue and cell membranes. : Your lungs fill with air, pulling in

The spinal cord acts as the main data cable, transmitting instructions from the brain to the rest of the body. This system is so fast that we can react to pain or heat in a fraction of a second, often before our conscious mind even registers the sensation. The Chemistry Lab: Digestion and Metabolism : Your lungs fill with air