Biology - Excretory Products and their Elimination Question with Solution | TestHub

The primary functions of the kidney include the separation and elimination of nitrogenous wastes (like urea and uric acid) from the blood, and the maintenance of homeostasis through osmoregulation by regulating water and electrolyte balance.

The kidneys also act as endocrine organs by producing hormones such as renin (which regulates blood pressure) and calcitriol (the active form of vitamin D, which helps in calcium absorption).

The transportation of urine from the renal pelvis to the urinary bladder is not performed by the kidney. This function is carried out by a pair of muscular tubes called the ureters.