What role does the heart play in blood circulation

The heart is the most important organ in the human body. The heart is responsible for the normal circulation of blood throughout the body. Therefore, if the heart shows symptoms of disease, the body will not be able to function normally, and severe heart disease may put life in danger. Therefore, it is very important to ensure the health and safety of your heart. So what is the role of the heart in blood circulation? Let us introduce it below.

The cardiovascular system is a relatively closed pipeline system composed of the heart and vascular system, in which blood flows in a certain direction and circulates endlessly, which is called blood circulation. According to the different circulation paths of blood in the body, blood circulation is divided into systemic circulation and pulmonary circulation. All the venous blood in the body flows into the right atrium, flows into the right ventricle through the tricuspid valve, and when the heart contracts, the blood is ejected into the pulmonary artery and flows through the capillaries of both lungs for gas exchange. After fully absorbing oxygen and releasing carbon dioxide, the dark red venous blood turns into bright red arterial blood and is then sent to the left atrium by the pulmonary veins. The blood flow path from the right ventricle to the left atrium is called the small circulation, that is, the pulmonary circulation. Next, the arterial blood from the left atrium flows into the left ventricle through the mitral valve. When the heart contracts, the fresh blood in the left ventricle is first pumped to the aorta, and reaches the capillaries through successive arterial branches, flowing through the entire body (including the heart and lungs) for substance exchange, transporting oxygen and nutrients to organ tissues and cells, and taking away waste and carbon dioxide produced by metabolism, becoming venous blood. Finally, the superior and inferior vena cava and coronary sinus bring the venous blood back to the right atrium. The blood circulation path from the left ventricle to the right atrium is called the systemic circulation.

The heart is a muscular organ that pumps blood and is the source of power for blood circulation. The rhythmic contraction and relaxation of the heart drives blood to flow continuously in the vascular system, thus maintaining normal life activities of the human body. The heart pumps blood at an amazing speed, ejecting blood at a speed of 8 meters per second. When the human body's activity increases, it pumps more blood to meet the needs of human life activities; when the human body is in a quiet state, it pumps less blood. It can be seen from this that if the heart, the central driving pump, stops beating, blood circulation will stop and life will end. It can be seen how important the heart is in maintaining human life activities.

After reading the above introduction to the role of the heart in blood circulation, now you know the importance of the heart. Therefore, we must pay attention to maintaining our heart in our daily lives. Maintain healthy living and eating habits. Proper exercise can enhance our cardiopulmonary function. Actively prevent the occurrence of cardiovascular and cerebrovascular diseases such as hypertension. Keep a happy attitude and don't put too much pressure on yourself.