Which organ is responsible for filtering blood in the human body?

The kidneys are the organs responsible for filtering blood in the human body. They perform this essential function by removing waste products and excess substances from the bloodstream, regulating electrolyte balance, and maintaining the overall fluid balance of the body. This process takes place through a series of filtration units called nephrons, where blood is filtered, and the resulting urine is created for excretion.

The kidneys also play a critical role in regulating blood pressure through the renin-angiotensin system and influencing the production of red blood cells through the release of erythropoietin. This multifaceted function highlights their importance not only in waste removal but also in maintaining homeostasis within the body.