The left atrium is one of the heart’s four chambers—and it plays a critical role in circulation.
After blood becomes oxygen-rich in the lungs, it returns through the pulmonary veins and enters the left atrium. From there, it passes through the mitral valve into the left ventricle, which pumps the blood into systemic circulation.
In this 16-second Body Spectra visualization, watch the journey of oxygen-rich blood through the left atrium and into the heart’s main pumping chamber.
Based on established cardiovascular anatomy from NCBI and peer-reviewed medical literature.
