Yes they do. Many organisms including mammals, fish, fungi and microorganisms do excrete urea.
The kidneys remove urea from the blood and excrete it in urine. Urea is a waste product formed from the breakdown of proteins in the liver.
The concentration of urea is high in urine because urea is a waste product produced by the liver when it breaks down proteins. The kidneys then filter urea from the blood and excrete it in urine to maintain the body's nitrogen balance.
The average adult must excrete around 25-35 grams of urea per day to maintain a stable concentration of urea in the blood. This waste product is produced when the body breaks down proteins from the food we eat.
decomposers
Sweat glands in the skin excrete water, salt, and urea as perspiration. These glands help regulate body temperature through the cooling effect of evaporation. The primary components of sweat are water and electrolytes, such as sodium chloride, while urea is a waste product of protein metabolism. This process is essential for maintaining homeostasis and preventing overheating.
The skin uses sweat to excrete water and urea.
Urea
the urea
Neither marine nor freshwater fish excrete urine or urea; both marine and freshwater fish excrete nitrogenous waste products as pure ammonia.
Lungs excrete carbon dioxide and kidneys excrete urea and other substance
Tadpoles excrete ammonia and frogs excrete urea
too much salt is not good,urea is toxic
The kidneys remove urea from the blood and excrete it in urine. Urea is a waste product formed from the breakdown of proteins in the liver.
Sharks excrete their urea through their skin. Hence the reason why they have a certain 'ammonia-like' kind of smell.
The openings in the skin for the discharge of water, salts, and urea are called sweat pores; these are the openings of sweat organs which delivery sweat containing these substances when the body needs to chill off
nitrifying bacteria
The end product of filtration and re-absorption in the kidneys is urine.