I would have to say the liver. Although the kidneys are used to filter many pharmaceuticals, the liver takes on the bulk of that job.
excreting organs include :- skin,lungs kidneys, bowel
kidney i believe could be liver
The urinary system.
The liver
kidneys
Kidney
kidney
integumentary, muscular, and skeletal systems
It is major organ that eliminates nitrogenous wastes from body .
Platypuses have a cloaca, which is used for both excretion and reproduction.
kidney
Kidneys
skin
I think for me the process of excretion with the process of defecation is by the process of excretion with the process of defecation. Therefore the defecation is the process of excretion by the process of defecation. Some says excretion is the process with the defecation process. That's why the organ contrast the process of excretion with the process of defecation.
The skin is considered an organ of excretion because it sweats, getting rid of toxins and certain mineral salts.
Worms use their skins for excretion mostly.
Kidneys
The Anus