The heart in the human body is a vital organ, weighing between 300 to 450 gms. The heart is responsible for pumping blood rich in oxygen for different biological functions to carry out. The heart beats approximately 72 times in a minute, ie, almost 100,000 times approximately in 24 hours.
A heart is a muscular organ made up of three layers of tissues, the outer pericardium, the middle myocardium and the inner endocardium. The pericardium forms the thin outer lining around the heart. The middle myocardium is a thick muscular layer and plays a major role in the contraction and pumping of blood from the heart. The last innermost layer is the endocardium, which forms a thin layer inside the heart.
Chambers of the heart
A heart has 4 different chambers, two on each side. The small upper two chambers are known as Atria and the bottom two larger chambers are ventricles. The septum of the heart is a dividing wall between the right and left sides of the heart.
Human heart is a hollow muscular organ with non-resting cardiac muscles. The muscles of a heart work more physically in comparison to other muscles in our body. The size of the heart is about the size of a clenched fist. The heart is located a little to the left of the middle of your chest, behind the breast bone and lungs, protected by the ribcage. The heart, the body's engine room, is responsible for pumping life-sustaining blood throughout the human body.
The valves are present between the chambers of the heart which prevents the backward flow of blood. Two of the valves, the mitral and tricuspid valves are present in between the chambers. The tricuspid valves are present in between the right atrium and right ventricle, and a bicuspid valve is present in the left side between the left atrium and left ventricle. The other two valves are the pulmonary valve and the aortic valve. The valve present between the right ventricle and the pulmonary artery is the pulmonary valve. Similarly the valve present between the left ventricle and the aorta is called the aortic valve.
The function of the heart
The heart functions as a double pumper, the right side pumps deoxygenated blood to the lungs for oxygenation. The left side of the heart transfers, the oxygenated blood from the heart to various parts of the body.
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