What system does the kidnies and liver belong to?

The kidneys and liver belong to two separate systems in the body:

- Kidneys: The kidneys belong to the urinary system, which is responsible for filtering waste products and excess water from the blood to produce urine. The urinary system also includes the ureters, bladder, and urethra.

- Liver: The liver belongs to the digestive system, which is responsible for the breakdown and absorption of food, the storage of nutrients, and the elimination of waste products. The liver is the largest internal organ in the body and performs over 500 different functions, including the detoxification of harmful substances, the production of bile, and the storage of glucose and vitamins.