The human skeleton provides several functions including support, protection, movement and making blood cells. Antagonistic muscles work against each other in pairs. The human reproductive system ...

Fever is a remarkable biological response, signaling the body’s active defense against internal threats. Far more than a ...

Find out about the different stages of a human life cycle and how ... What is the digestive system? Discover how the food gets into the body, through the digestive system. What happens to food ...