Question

Draw a schematic diagram of the human heart.

Answer 1

Human heart:

1. It is the prime organ of the cardiovascular system.
2. The heart is a fist-sized organ, which pumps blood all through the body.
3. In humans it is situated in front of the chest, it is present slightly behind and to the left of the sternum. It is protected by the ribcage.
4. The heart comprises four prime chambers formed of muscle and is powered by electrical impulses.
5. The two bottom chambers are known as ventricles, and the two upper chambers are known as atria.
6. An inter-atrial septum separates the left and right atria.
7. An inter-ventricular septum separates the left and right ventricles.
8. A thick fibrous structure known as the atrioventricular septum divides the atrium and ventricle of the same side.
9. The opening between the right atrium and ventricle is guarded by a tricuspid valve.
10. The opening between the left atrium and left ventricle is guarded by a bicuspid valve.
11. The nervous system and the brain mediate the functioning of the heart.
12. The prime activities of the heart are to monitor the speed and rhythm of the heart rate and to maintain blood pressure.