Slimy! Slippery! Saliva is none other than spit, the clear liquid in your mouth that's made of water and other chemicals. Saliva helps keep the mouth moist and contains an enzyme that starts to break down food even before it hits your stomach!
© 1995-2014 KidsHealth® All rights reserved. Images provided by iStock, Getty Images, Corbis, Veer, Science Photo Library, Science Source Images, Shutterstock, and Clipart.com