Heart is a pumping organ which pumps deoxygenated blood to the lungs for purification. So,heart pumps oxygenated blood to all parts of the body.

Function of Heart

The heart is a muscular organ located in the chest that pumps blood throughout the body. It is an essential organ that helps to sustain life by delivering oxygen and nutrients to the body's cells and removing waste products.

Structure of Heart

The heart is divided into four chambers: the right atrium, the left atrium, the right ventricle, and the left ventricle. The atria are the upper chambers, and the ventricles are the lower chambers. The heart is also surrounded by a sac called the pericardium, which helps to protect and lubricate the heart.

Function of Heart Chambers

The right atrium receives deoxygenated blood from the body through the superior and inferior vena cava. The blood then flows into the right ventricle, which pumps it to the lungs for oxygenation. The left atrium receives oxygenated blood from the lungs through the pulmonary veins. The blood then flows into the left ventricle, which pumps it to the rest of the body.

Heart Valves

The heart has four valves that help to regulate the flow of blood through the heart. The tricuspid valve is located between the right atrium and the right ventricle, and the mitral valve is located between the left atrium and the left ventricle. The pulmonary valve is located between the right ventricle and the pulmonary artery, and the aortic valve is located between the left ventricle and the aorta.

Function of Heart Valves

The valves open and close in response to changes in pressure within the heart. When the heart contracts, the atrioventricular valves close to prevent blood from flowing back into the atria. The semilunar valves open to allow blood to flow out of the heart. When the heart relaxes, the semilunar valves close to prevent blood from flowing back into the ventricles, and the atrioventricular valves open to allow blood to flow into the ventricles.

Conclusion

In summary, the heart is an essential organ that helps to sustain life by pumping blood throughout the body. It is composed of four chambers, four valves, and a protective sac called the pericardium. The heart's chambers and valves work together to regulate the flow of blood through the heart and ensure that oxygen and nutrients are delivered to the body's cells.