The human heart is located between the lungs, in the center of the chest, beneath the sternum, and slightly to the left. The pericardium is a two-layered membrane wrap around the heart like a bag. The pericardium is a membranous layer covering the heart.
One of the most vital life-sustaining organs is the four-chambered muscular organ, the human heart. It's the same size as a clenched fist, one of the strongest muscles in the human body, and weighs around 200 to 425 grams.
The human heart is a muscular organ with four chambers. The majority of its volume is inclined to the left side of the sternum. A membranous pericardium surrounds the heart. Source
1) Layers of the Heart Wall
The heart is made up of three distinct layers of tissue.
2. Chambers of the Heart
The human heart consists of four chambers:
The atriums are comparatively thin-walled chambers that receive blood from the veins. The ventricles are thick-walled chambers that pump blood away from the heart to all the body parts.
The difference in the thickness of the ventricular wall of the heart is due to the difference in the volume of myocardium present, which is essential as ventricles have to pump blood against greater resistance while maintaining high pressure.
The right atrium gets deoxygenated blood from everywhere across the body through veins. The pulmonary veins bring oxygenated blood from the lungs to the left atrium.
3) Valves of the Heart
The heart has four valves that allow the blood to flow unidirectionally.
4) Pathway of Blood through the heart
5) Blood Supply to Myocardium
1. What is a heart made up of?
The heart is made of three layers of tissue. Endocardium, the thin inner lining of the heart chambers that also forms the surface of the valves. The myocardium, the thick middle layer of muscle that allows your heart chambers to contract and relax to pump blood to your body. Pericardium, the sac that surrounds your heart.
2. What is the Human Heart weight?
The average gross weight of the heart was 289.6 g for men at the age of 31-40 years, 284.7 g for women at the same age. At 61-70 years, the average weight was 345.9 g for men and 285.1 g for women.
3. What are the four main functions of the heart?
The four primary functions of the heart are:
4. Can a person live without a heart?
No. the human heart is the most critical organ of the body to keep a person alive.
5. Can a human have two hearts?
No, a human cannot have two hearts.
6. How does the heart last so long?
The human heart comprises cardiac muscles, which are stronger than normal muscles. The endurance of these muscles is very high, and they do not get fatigued and keep functioning till death.
7. What is the total artificial heart?
A total artificial heart is a surgically implanted pump to replace sick or damaged heart ventricles to supply circulation to the body. This condition is a temporary way to prolong life. Still, the permanent cure is treating the heart completely or a heart transplant as a last resort.
8. Are you dead if your heart stops?
Quite often the heart can stop beating due to various reasons. Most commonly, no heartbeat indicates death, but this is not compulsory that a still heart means death. Instant administration of CPR and defibrillation can restart the heart back to normal functioning. But it is important to note here that immediate administration of CPR is important. After the heart stops beating, there is only a resort of a couple of minutes until permanent neurological damage is not coming back.
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