Which system filters your blood, removing waste and excess water?

• A. Urinary System
• B. Digestive System
• C. Circulatory System
• D. Endocrine System

Answer: (A)

Filtering blood and removing waste and excess water is the job of the urinary system, mainly through the kidneys. The kidneys continuously filter the bloodstream, removing metabolic wastes like urea, along with extra water and electrolytes, and they help maintain fluid balance, electrolyte balance, and pH. The resulting urine travels from the kidneys through the ureters to the bladder and is excreted via the urethra. The digestive system handles breakdown and elimination of solid waste from food; the circulatory system moves blood and substances but does not perform filtering of blood itself; the endocrine system regulates hormones. So the urinary system best matches the function described.