Write in detail the parts of human heart and its working. Class 10
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Answer:
Introduction to the Human Heart
The human heart is one of the most important organs responsible for sustaining life. It is a muscular organ with four chambers. The size of the heart is the size of about a clenched fist.
The human heart functions throughout a person’s lifespan and is one of the most robust and hardest working muscles in the human body.
Besides humans, most of the other animals also possess a heart that pumps blood throughout their body. Even invertebrates such as grasshoppers possess a heart like pumping organ, though they do not function the same way a human heart does
Position of Heart in Human Body
The human heart is located between the lungs in the thoracic cavity, slightly towards the left of the sternum (breastbone). It is derived from the embryonic mesodermal germ layer.
The Function of Heart
The function of the heart in any organism is to maintain a constant flow of blood throughout the body. This replenishes oxygen and circulates nutrients among the cells and tissues.
Following are the main functions of the heart:
One of the primary functions of the human heart is to pump blood throughout the body.
Blood delivers oxygen, hormones, glucose and other components to various parts of the body, including the human heart
The heart also ensures that adequate blood pressure is maintained in the body
There are two types of circulation within the body, namely pulmonary circulation
Types of Circulation
Pulmonary circulation is a portion of circulation responsible for carrying deoxygenated blood away from the heart, to the lungs and then brings oxygenated blood back to the heart.
Systemic circulation is another portion of circulation where the oxygenated blood is pumped from the heart to every organ and tissue in the body, and deoxygenated blood comes back again to the heart.
Now, the heart itself is a muscle and therefore, it needs a constant supply of oxygenated blood. This is where another type of circulation comes into play, the coronary circulation.
Coronary circulation is an essential portion of the circulation, where oxygenated blood is supplied to the heart. This is important as the heart is responsible for supplying blood throughout the body.
Moreover, organs like the brain need a steady flow of fresh, oxygenated blood to ensure functionality