Multiple choice

Which one of the following is not an excretory organ?

  1. Kidneys

  2. Liver

  3. Lungs

  4. Spleen

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

 Among these, spleen is not an excretory organ.It is involved in the production and removal of blood cells in most vertebrates and forming part of the immune system.