Yes. Skin is the largest organ in the body and excretes toxins via sweat.
No, feces do not excrete through a pig's skin. Pigs excrete feces through their anus, like most other animals. The skin of pigs is not designed to excrete waste in this manner.
A pig's digestive system does not filter out toxins, like most animals. The toxins work through the pig and deposit into their flesh and fat, never filtering out.
We can excrete waste products through urine, feces, and sweat. These processes help remove toxins and regulate body functions.
Urea
No. The skin does.
There are several organs that are involved in the process of excretion; the pores of the skin that excrete oil and sweat, the lungs which excrete carbon dioxide, the rectum via the anal canal and anus that excretes feces, and the urinary tract which excretes urine via the urethra. Some anatomists consider the kidneys as the only excretory organ.
The main waste excreted by the skin is heat.
Your kidneys filter waste products and toxins from your blood and excrete them, along with water, as urine.
The skin uses sweat to excrete water and urea.
No.
Sharks excrete their urea through their skin. Hence the reason why they have a certain 'ammonia-like' kind of smell.
When human populations become too dense and adverse the plants start to excrete nerve toxins killing millions.