The oxygenated blood from the lungs is received by the

The human heart consists of four chambers designed to pump blood through two distinct circuits. Oxygenated blood returns from the lungs via the pulmonary veins and is first received by the left atrium (also historically referred to as the left auricle) [3]. When the left atrium relaxes, it collects this oxygen-rich blood; it then contracts to transfer the blood into the left ventricle [4]. From the left ventricle, the blood is pumped through the aorta to the rest of the body [4]. In contrast, the right side of the heart deals with deoxygenated blood: the right atrium receives deoxygenated blood from the body, which is then sent to the right ventricle to be pumped to the lungs for re-oxygenation [1]. Therefore, the left atrium is the specific chamber that receives oxygenated blood directly from the pulmonary circulation [3].

Sources

1. [1] Science , class X (NCERT 2025 ed.) > Chapter 5: Life Processes > Our pump — the heart > p. 92
2. [3] https://www.cdc.gov/heart-defects/how-the-heart-works/index.html
3. [4] https://www.betterhealth.vic.gov.au/health/conditionsandtreatments/circulatory-system