The human body is made up of cells, which make up tissues, which in turn make up organs that form the basis of systems, all working together to keep us alive. Learn how body systems and their vital ...

Your data can be used to monitor for and prevent unusual and possibly fraudulent activity (for example, regarding advertising, ad clicks by bots), and ensure systems and processes work properly ...

An animated sequence that tours the human ... and toes are all visited. The commentary makes the point that some people need glasses, hearing aids or prosthetics to help certain body parts function.

When a person takes part in exercise the cardiovascular, respiratory, energy and muscular systems all work together to ... more oxygenated blood around the body.