Yes. Skin is the largest organ in the body and excretes toxins via sweat.
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.
Urea
I just found this out because my dog is in renal failure. Amphogel (aluminum hydroxide) is a "phosphorus binding agent" which is needed to excrete phosphorus due to the failing kidney's ability to process and excrete toxins. Build up of toxins in the system takes place when the kidneys are damaged and or failing and they're unable to process these toxins and excrete from the body in the urine. Hope this helps
Yes, they do. They don't, however, have sweat glands. That's why they roll in the mud. A common misconception is that they don't have pores which is why they roll in the mud. But that is wrong.
No. The skin does.
NO.
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.
When human populations become too dense and adverse the plants start to excrete nerve toxins killing millions.
Sharks excrete their urea through their skin. Hence the reason why they have a certain 'ammonia-like' kind of smell.