Ever wonder what you're made of? The simple answer is cells. These are the smallest building block of every living thing on our planet, including you. You have trillions of cells in every part of your body that do everything from changing your food into energy to keeping you healthy.
Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor.
© 1995-2019 KidsHealth ® All rights reserved. Images provided by iStock, Getty Images, Corbis, Veer, Science Photo Library, Science Source Images, Shutterstock, and Clipart.com