​HEART

​ The heart is a hollow muscular organs about the size of your fist. Its main function is to pump blood through the blood vessels by repeated rhythmic contractions. Your heart moves blood  through all parts of the body to transport nutrients such as oxygen and take out waste materials such as carbon dioxide.

​BRAIN

​ The brain is one of the most important organs in the body. It interprets the information it receives and responds by sending messages to different parts of the body by telling them to act.