Watch a watermelon wrapped in rubber bands explode in slow-motion. (CBS News) Have you ever wondered if you could cause a watermelon to explode by wrapping a ton of rubber bands around it? And have you additionally wondered what that explosion would end up looking like in super slow-motion? The answer to both questions is probably not, but it's very cool to watch happen anyways.
Four valves control the flow of blood from the atria to the ventricles and from the ventricles into the two large arteries connected to the heart. 1  The tricuspid (tri-CUSS-pid) valve is in the right side of the heart, between the right atrium and the right ventricle.
Four valves are present in the heart to prevent blood from flowing in the wrong direction. Two of these are the atrioventricular (AV) valves between the atria and ventricles. The left AV valve is called the bicuspid (or mitral) valve, while the right AV valve is called the tricuspid valve. The other two are the semilunar valves: one between the right ventricle and the pulmonary artery and the other between the left ventricle and the aorta.