Which side of the heart receives oxygen-rich blood from the lungs?

The left side of the heart receives oxygen-rich blood from the lungs through the pulmonary veins. Once blood travels from the lungs, it is high in oxygen and enters the left atrium. From there, it moves into the left ventricle, which then pumps it out to the rest of the body through the aorta. This efficient process is essential for delivering oxygen to various tissues and organs, enabling them to function properly.

The right side of the heart, in contrast, receives deoxygenated blood from the body, which is low in oxygen and high in carbon dioxide. The role of the right side is fundamental for sending this blood to the lungs for oxygenation. The terms "top" and "bottom" are not relevant in this context, as they do not accurately describe the function of the heart's chambers related to oxygen-rich blood. Understanding the flow of blood through the heart is crucial for comprehending cardiovascular health and the impact of physical activity on the body.