What is the relationship between the right and left sides of the heart?

The left side of the heart is responsible for delivering oxygenated blood to the rest of the body, while the right side of the heart is tasked with receiving deoxygenated blood from the body's tissues and transporting this blood to the lungs for oxygenation. In this role, the right side essentially serves as the entry point for blood that has already circulated and is now low in oxygen. This blood then travels through the pulmonary arteries to the lungs, where it is re-oxygenated. Once oxygenated, this blood returns to the left side of the heart, where it is pumped out to the body again. This interconnected system of circulation illustrates how the two sides of the heart work in tandem to ensure continuous blood flow and oxygen delivery throughout the body.