What is the primary function of the urinary system?

The primary function of the urinary system is to remove nitrogen-containing wastes from the body. This process is critical for maintaining homeostasis and involves filtering blood to eliminate waste products produced during the metabolism of proteins, such as urea, creatinine, and uric acid. The kidneys play a central role in this system by filtering the blood, reabsorbing necessary substances, and excreting the waste through urine. By regulating the composition of body fluids and ensuring the excretion of harmful substances, the urinary system helps maintain the body's overall chemical balance and prevent the accumulation of toxic materials in the bloodstream.