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Which organ in the human body is responsible for purifying blood?
Heart
Lungs
Kidneys
Liver
Kidneys
The kidneys are the primary organs responsible for filtering and purifying the blood in the human body. They remove metabolic waste products, excess salts, and water, which are then excreted as urine.
The kidneys are the primary organs responsible for filtering and purifying the blood in the human body. They remove metabolic waste products, excess salts, and water, which are then excreted as urine.
The kidneys act like a water purification plant in a city; they filter out the dirty water (blood), remove the contaminants, and send the clean water back to the pipes while disposing of the sludge as waste.
Kidneys: Keep ItDown, Nasty Yucky Substances!
GFR=PxтАЛUxтАЛтЛЕVтАЛ тАФ Glomerular Filtration Rate formula where UxтАЛ is urine concentration, V is urine flow rate, and PxтАЛ is plasma concentration of substance x
The process occurs in the nephrons, the functional units of the kidney. Blood enters the glomerulus under high pressure, where filtration occurs based on size and charge. The filtrate is then modified through reabsorption and secretion in the renal tubules, balancing electrolytes and acid-base homeostasis through the regulation of H+ and HCO3тИТтАЛ ions.
The functional unit of the kidney is the nephron.
Kidneys play a vital role in maintaining blood pressure via the Renin-Angiotensin-Aldosterone System (RAAS).
They also trigger the production of erythropoietin to stimulate red blood cell production.
Maintains homeostasis of body fluids
Prevents toxic accumulation of nitrogenous wastes like urea and creatinine
Dialysis for patients with kidney failure
Regulation of blood pH through bicarbonate buffering
Normal GFR for a healthy adult is approximately 125 mL/min.
Option A (Heart) acts as a pump, not a filter. Option B (Lungs) perform gaseous exchange (O2тАЛ and CO2тАЛ). Option D (Liver) detoxifies chemicals but does not perform the primary mechanical filtration of blood plasma.
C is correct тАФ The kidneys perform the essential biological filtration of blood plasma to remove nitrogenous waste products.
In competitive exams, remember that while the liver detoxifies toxins, the kidney is the 'filter' for excretory waste; don't confuse detoxification with mechanical filtration.
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