This is the string that doctors use to sew things together. Stitches hold the edges of your skin together so a cut can heal properly. When you have stitches in your skin, usually you have to go back to the doctor to get them removed. When you have surgery, the doctor may use a different kind of suture, which dissolves on its own.
© 1995-2014 KidsHealth® All rights reserved. Images provided by iStock, Getty Images, Corbis, Veer, Science Photo Library, Science Source Images, Shutterstock, and Clipart.com