The primary by-product of protozoan excretion is ammonia
The kidneys remove nitrogenous waste from the blood and produce urine to remove the waste.
Urine contains nitrogenous wastes.
Azotemia or uremia means high blood levels of nitrogenous waste.
nitrogenous waste
Urea
uric acid
yes
fatty acids
yes it is
Mollusks have a unique way of excreting nitrogenous waste. It is processed in the excretory organ and released into the water.
Grasshoppers eliminate their nitrogenous waste through the malipighian tubules that are on the digestive tract. Earthworms eliminate their nitrogenous waste by the nephridia.
Urea is the nitrogenous waste product filtered from the blood and excreted in the form of urine.