Which organ in the human body is primarily responsible for pumping oxygenated blood to all parts of the systemic circulation?

💡 Solution & Explanation

The human heart is a muscular organ divided into four chambers that functions as a rhythmic double pump to circulate blood throughout the body via blood vessels. Lungs are responsible for gaseous exchange, kidneys filter metabolic wastes from blood to form urine, and the liver performs metabolic processing and bile secretion. The left ventricle of the heart has the thickest muscular wall because it must generate enough pressure to force blood through the entire systemic circuit.