Final answer:
The right ventricle propels deoxygenated blood to the lungs, while the left ventricle pumps oxygenated blood to the rest of the body. The left ventricle has thicker walls than the right ventricle due to the higher force required to circulate blood throughout the entire body.
Step-by-step explanation:
The human heart is a powerful muscle responsible for circulating blood throughout the body. It consists of four chambers: the right atrium, right ventricle, left atrium, and left ventricle. Blood enters the right atrium and is pumped into the right ventricle, which then forces the blood to the lungs via the pulmonary arteries. This is where it picks up oxygen. Once blood returns from the lungs to the left atrium, it is pushed into the left ventricle, which has the main role of pumping oxygen-rich blood to the rest of the body through the aorta. The left ventricle's muscular walls are thicker than those of the right ventricle because it needs to generate enough force to circulate blood to the entire body, including the extremities like your big toe.