Technically skin doesn't excrete anything, skin glands aren't there to don't remove waste from the body. They secrete substances instead, which is different from excretion.
Gland skin cells are so called excitable cells, which can transform chemical work into physical. So, for instance, a nerve signal or membrane polarisation can cause glands to secrete the stuff inside.
All of the organs mentioned excrete waste. The lungs excrete carbon dioxide, the large intestine excretes solid waste, and the kidneys excrete nitrogenous waste.
Yes. Like all birds, mammals, reptiles, amphibians etc., flamingos indeed excrete.
Yes, all animals excrete waste.
Kidneys excrete nitrogenous waste (urine) and also regulate the water balance in vertebrates. Rat is a vertebrate, too.
All living organisms need to excrete waste, as this is one of the characteristics of life. When they are alive, dragonflies excrete waste.
Ants do not technically urinate, because they excrete all waste through a single orifice, which is called the anus.
Oh, yes. In pretty much the normal fashion. A little string comes out of the back of the fish. Almost all animals excrete wastes. Fishes excrete an ammonia-based waste product.
All animals excrete, and all plants do, too. It's a necessary way of removing waste products from a living organism. Several do not excrete solid waste, though, if that's what you have in mind.
Siberian Tigers are similar to all other mammals in this respect.
Yes, all living things produce waste as a byproduct of their normal metabolic processes. This waste is typically eliminated from the organism to maintain health and proper functioning.
Yes. All living things produce some waste. For chromista waste is excreted through the cell wall.
Dogs excrete waste products through defecation and urination. They have a gastrointestinal system that breaks down food, with solid waste expelled through the anus and liquid waste through the urethra.