When does puberty begin and what are its effects? How are genes passed from one generation to the next? What can STDs affect the reproductive system? Investigate the miracles of the human body with Body Focus. Find out about the body parts and systems that enable us to eat, run, jump, think, and feel? Discover what sorts of things can go wrong with our bodies, from common illnesses to more unusual problems. The Reproductive System explores the the...

Where is the longest bone in the human body? How can we protect our bones when playing sports? What causes osteoarthritis, and can it affect young people? Investigate the miracles of the human body with Body Focus. Find out about the body parts and systems that enable us to eat, run, jump, think, and feel. Discover what sorts of things can go wrong with our bodies, from common illnesses to more unusual problems. Bones explores how the skeleton supports...

Why does your heart beat faster when you are afraid? How can steroid abuse affect your body's hormones? What causes diabetes, and can it be prevented? Investigate the miracles of the human body with Body Focus. Find out about the body parts and systems that enable us to eat, run, jump, think, and feel. Discover what sorts of things can go wrong with our bodies, from common illnesses to more unusual problems. Hormones explores the functions and structure...

How long are your intestines? Why are healthy teeth so important to the digestive system? How does alcohol affect the digestive system? Investigate the miracles of the human body with Body Focus. Find out about the body parts and systems that enable us to eat, run, jump, think, and feel. Discover what sort of things can go wrong with our bodies, form common illnesses to more unusual problems. The Digestive System explores the structure of the different...