Add Yahoo as a preferred source to see more of our stories on Google. The human body is a wonderous thing, especially when you consider how intricate and efficient each bodily system is. For instance, ...

Scott Sheffield has been teaching anatomy at the university level for over 21 years. He has passionately and carefully produced the site "Get Body Smart - Human Anatomy and Physiology". This site ...

As you bite into a crisp apple, your jaw muscle contracts, allowing you to grind the fruit between your teeth. When you climb a flight of stairs, your gluteus maximus (or "glutes") push your body ...