Question

what do you mean by human heart please explain well ??

Answer 1

⭐The heart is a muscular organ which pumps blood through the blood vessels of the circulatory system.

⭐The human heart is a vital muscular organ that beats 72 times per minute.

⭐The heart is a muscular organ that pumps blood to our body.

✨Our heart is at the center of your circulatory system.
➡ This system consists of a network of blood vessels, such as arteries, veins, and capillaries.

✨The lungs provide a place to exchange carbon dioxide for oxygen.


➡ The flow of blood through the four chambers of the heart is regulated by valves.

✨The heart consists of four chambers, two atria that is upper chambers and two ventricles that is lower chambers.

✨ There is a valve through which blood passes before leaving each chamber of the heart.

✨The valves prevent the backward flow of blood.

✨The blood provides our body with the oxygen and nutrients it needs. It also carries away the waste from our body/blood.

✨ Basically,our heart is sort of like a pump, or two pumps in one.

✨Or in short, The right side of your heart receives blood from the body and pumps it to the lungs.

⭐Refer diagram of human heart.

Answer 2

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HUMAN HEART :

The heart is one of the most important organs in the entire human body. It is really nothing more than a pump, composed of muscle which pumps blood throughout the body, beating approximately 72 times per minute of our lives. The heart pumps the blood, which carries all the vital materials which help our bodies function and removes the waste products that we do not need.

FOR EXAMPLE: The brain requires oxygen and glucose, which, if not received continuously, will cause it to loose consciousness. Muscles need oxygen, glucose and amino acids, as well as the proper ratio of sodium, calcium and potassium salts in order to contract normally. The glands need sufficient supplies of raw materials from which to manufacture the specific secretions. If the heart ever ceases to pump blood the body begins to shut down and after a very short period of time will die.

The heart is essentially a muscle(a little larger than the fist). Like any other muscle in the human body, it contracts and expands. Unlike skeletal muscles, however, the heart works on the "All -or-Nothing Law". That is, each time the heart contracts it does so with all its force. In skeletal muscles, the principle of "gradation" is present. The pumping of the heart is called the Cardiac Cycle, which occurs about 72 times per minute. This means that each cycle lasts about eight-tenths of a second. During this cycle the entire heart actually rests for about four-tenths of a second.