1. Kidneys:

* Primary organs of excretion: Filter waste products from the blood and produce urine.

* Regulate blood volume and pressure: By adjusting the amount of water and electrolytes excreted.

* Maintain blood pH: By excreting acids and bases.

2. Ureters:

* Two tubes that carry urine from the kidneys to the bladder.

3. Urinary Bladder:

* Stores urine until it is ready to be eliminated.

4. Urethra:

* Tube that carries urine from the bladder to the outside of the body.

Other organs involved in excretion:

* Lungs: Excrete carbon dioxide (CO2) and water vapor.

* Skin: Excretes sweat, which contains water, salts, and urea.

* Liver: Processes waste products and produces bile, which is excreted into the small intestine.

* Large intestine: Absorbs water and electrolytes from undigested food and forms feces.

It's important to note that while the kidneys are the main organs of excretion, other organs play a supporting role in eliminating waste products from the body.