The sound we hear when we listen to our heart beating is the sound made by the valves closing. The biggest artery in our body is the Aorta. Your heart beats over 2.5 billion times in your lifetime. The wall of the muscle that separates the sides of the heart is called the septum. Your heart starts beating about 7 to 8 months before you are born.
Blood pressure is the force with which the blood pushes against the walls of the arteries.
The heart is made up of a special muscle called cardiac muscle or myocardium. We use a stethoscope to listen to our heart beat. We take our pulse at our neck or wrist. A normal adult's heart rate is 60 to 90 beats in a minute. A normal child's heart beats more than 140,000 times a day.