GCSE Bitesize: The heart. Once upon a time... Life - The heart (3 of 3) Once upon a time... Life - The heart (2 of 3) Once upon a time... Life - The heart (1 of 3) Your Heart & Circulatory System. Listen Did you give your friends valentines and little heart-shaped candies on Valentine's Day?
Do you ever cross your heart when making a promise that you really, really mean? Or turn on the radio to hear a guy singing about his broken heart? We see and hear about hearts everywhere. A long time ago, people even thought that their emotions came from their hearts, maybe because the heart beats faster when a person is scared or excited. Heart and Circulatory System. Listen Things That Can Go Wrong Problems with the cardiovascular system are common — more than 64 million Americans have some type of cardiac problem.
Circulatory system.