Yes they do. Many organisms including mammals, fish, fungi and microorganisms do excrete urea.
stuff <--------- that was a dumb answer :P ----------> it can produce cheese :)
Sporosarcina urea ferments glucose and lactose but not sucrose. It is a type of bacteria of the genus Sporosarcina, and is closely related to the genus Bacillus.
decomposers
Kidneys must excrete water in the urine so as to maintain homoeostasis in the body. The kidneys will excrete concentrated urine.
The bacteria's waste products are toxic to humans. They eat the food, excrete toxins, and when you eat the toxins you get sick. This is especially true for anaerobic bacteria. It is also possible for the bacteria themselves to infect your body, but it's still pretty much the same process. The bacteria eat bits of you, excrete toxins, and you get sick. That's VERY basic, of course, but the long answer is quite long & that's the gist of it.
The skin uses sweat to excrete water and urea.
Urea
Neither marine nor freshwater fish excrete urine or urea; both marine and freshwater fish excrete nitrogenous waste products as pure ammonia.
When you cry, don't you excrete salt water? when you run and sweat, you excrete salt water. When you drink water and later pee, you excrete urea.
the urea
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
stuff <--------- that was a dumb answer :P ----------> it can produce cheese :)
Sharks excrete their urea through their skin. Hence the reason why they have a certain 'ammonia-like' kind of smell.
nitrifying bacteria
The end product of filtration and re-absorption in the kidneys is urine.