3.42 Muscle Facts Did you know your heart is a muscle? Learn about the different types of muscles in your body, how muscles work, and what muscles are made of in this lesson. Mighty Muscles Did you know your heart…

3.41 Teeth Facts Teeth are the hard bony structures in the mouth used to chew food. Discover the different types of teeth, how many teeth are in the human mouth, and the parts of a tooth, such as the enamel,…

3.40 Human Eye Facts & Anatomy After light enters the human eye, it is eventually transmitted through signals to the brain. Learn about the similarities between a camera and the eye, and the six parts of the human eye. The…

3.39 Bone Facts Did you know that babies have more bones than adults? Learn about how bones grow and change as you age, what your bones do, and what they’re made of in this lesson. Your Bones Are Alive! Think…

3.38 Autism : Definition & Facts You might know someone with autism, but what does that mean, exactly? Find out how this condition affects language, social skills, and other aspects of every day life for those who have it. What…

3.37 Brain Anatomy Our brain helps us do everything it enables us to breathe, keeps our heart beating, helps us ride a bicycle, allows us to see color, and so much more. Learn about the different parts of your brain…