What is the primary role of the urinary system?

The primary role of the urinary system is to eliminate waste from the body. This system is responsible for filtering blood to remove waste products and excess substances, which are then excreted as urine. The kidneys play a vital role in this process by regulating the composition of blood and removing urea, creatinine, and other metabolic waste products.

In addition to waste elimination, the urinary system also helps maintain homeostasis by balancing water and electrolyte levels, which indirectly contributes to blood pressure regulation, but that is not its main function. Other systems of the body, such as the respiratory system and cardiovascular system, are responsible for transporting oxygen and nutrients. Thus, the urinary system's primary function is centered on waste management and excretion.