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.
It is the same as with humans... it is the refuse of whatever had been digested within the past 24 hours or so.
Urine
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.
excretory system by Jeff hirst skyline
Feces and urine
kidney, skin,
nephridia is the main excretory organ of annelida
urethra
The main organ in the excretory system is the kidney. The kidney is the main organ that controls the excretory systems for vertebrates. It is also part of the Urinary system which is part of the excretory system.
ammonia
guanine