Which organ is responsible for the filtration of blood?

The kidneys are vital organs responsible for the filtration of blood in the body. This process involves the removal of waste products, excess substances, and toxins from the bloodstream, which is then converted into urine for excretion. The kidneys contain millions of tiny filtering units called nephrons, which play a crucial role in maintaining homeostasis by regulating fluid balance, electrolyte levels, and blood pressure. They also contribute to the balance of acids and bases in the body.

The liver, while also crucial for detoxifying substances and metabolizing nutrients, does not filter blood in the same manner as the kidneys. The heart functions as the pump that circulates blood throughout the body but does not engage in filtration. The lungs are involved in gas exchange, specifically the exchange of oxygen and carbon dioxide, rather than the filtration of blood. This understanding highlights the specialized roles various organs have in maintaining bodily functions and the importance of the kidneys in the overall process of blood filtration.