The 右心房, or right atrium, is one of the four chambers of the heart. It receives deoxygenated blood from the body through the superior and inferior vena cavae. This chamber plays a crucial role in the circulatory system by collecting blood that needs to be sent to the lungs for oxygenation. Once the 右心房 fills with blood, it contracts to push the blood into the 右心室, or right ventricle. From there, the blood is pumped to the lungs via the pulmonary arteries. This process is essential for maintaining proper oxygen levels in the blood and supporting overall body function.