Okay, the answer I got for this question was that mammals excrete in two ways. The first was in during the digestive system. It simply means that the waste goes through the body and out the anus. The other way is that they go through chemical waste. This means whenever a mammal breathes for example, you breathe in air but you must breathe out the chemical carbon dioxide from the body.
Ammonia is the main excretory product of a cockroach is ammonia. The excretory organ of a cockroach is called the malpighain tubes.
kidney
The main excretory products in the human beings are urea,excess water,salt and the nitrogeneous compounds.
Ammonia is the primary nitrogenous excretory product of urination. It is the main excretory product of animals. Water animals tend to be more tolerant of high ammonia blood levels than land animals.
The main excretory product of humans is urine, which is produced by the kidneys as they filter waste products from the blood. Urine is then excreted from the body through the process of urination.
Feces and urine
kidney, skin,
nephridia is the main excretory organ of annelida
urethra
guanine
the main parts of the excretory system is the skin,the kidneys,the liver,and the bladder
Mammals have nervous, digestive, circulatory, skeletal, immune, muscular, integumentary, and excretory systems.