Right Atrium
The right atrium is one of the four chambers of the human heart
The right atrium is one of the four chambers of the human heart. It is located on the right side of the heart and is connected to the right ventricle through the tricuspid valve. The main function of the right atrium is to receive deoxygenated blood from the body and pump it into the right ventricle.
Blood enters the right atrium through two major veins, the superior vena cava and the inferior vena cava. The superior vena cava brings oxygen-depleted blood from the upper part of the body, including the head, neck, and upper limbs, while the inferior vena cava brings blood from the lower part of the body, such as the abdomen and lower limbs.
Once the deoxygenated blood enters the right atrium, it passes through the tricuspid valve into the right ventricle. The tricuspid valve prevents backflow of blood from the ventricle to the atrium when the heart contracts.
During the cardiac cycle, when the heart relaxes (diastole), the right atrium receives blood from the veins, and when the heart contracts (systole), it pumps blood into the right ventricle. From the right ventricle, the blood is then pumped to the lungs through the pulmonary artery to be oxygenated.
In summary, the right atrium functions as a receiving chamber for deoxygenated blood returning from the body and sends it to the right ventricle to be pumped to the lungs for oxygenation.
More Answers:
Understanding the Importance and Function of the Left Ventricle in the Human HeartThe Role and Function of the Right Ventricle in the Circulatory System
The Importance of the Left Atrium in Oxygenating and Circulating Blood: An Overview of its Functions and Role in the Cardiovascular System