7A - Cells - Bill Nye the Science Guy. Circulatory System Bill Nye on the Heart (Part 2) Circulatory System Bill Nye on the Heart (Part 1) Tell Me - Your Cardiovascular System. Movie: Heart & Circulatory System. 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. Now we know that emotions come from the brain, and in this case, the brain tells the heart to speed up.
So what's the heart up to, then? Working That Muscle Your heart is really a muscle. But the heart muscle is special because of what it does. Your heart is sort of like a pump, or two pumps in one. <a href=" you ever listened to your heartbeat using a stethoscope? We Got the Beat How does the heart beat? Heart Parts The heart is made up of four different blood-filled areas, and each of these areas is called a chamber. Human Circulatory System Video - Heart, Arteries, Capillaries, Blood & Veins.