Final answer:
The right side of the heart pumps deoxygenated blood to the lungs, while the left side pumps oxygenated blood to the rest of the body.
Step-by-step explanation:
The right side of the heart pumps deoxygenated blood to the lungs in the pulmonary circulation, while the left side pumps oxygenated blood to the rest of the body in the systemic circulation.
In humans, the heart is divided into four chambers: two atria and two ventricles. The right atrium receives deoxygenated blood from the systemic circulation, while the left atrium receives oxygen-rich blood from the lungs.
This pattern of pumping is referred to as double circulation and is found in all mammals.