Humans cannot breathe through their skin because they are large organisms. Smaller organisms, such as frogs or flatworms, are able to absorb oxygen through their skin because the oxygen doesn't have to travel fr from the surface of the skin. It also has to do with the fact that human skin isn't as moist as the skin of frogs, etc., and moist skin is required for transdermal breathing.
yes
through gills
cutaneous
Well, wolves ( all mammals ) use their lungs. Just like humans. Where as fish use gills!
Amphibians use their lungs, and use their thin skin when its moist.
Frogs uses respiratory surfaces which totals to three to exchange gases on its surroundings. The three respiratory surfaces are the skin, its lungs, and the lining of their mouth.
By gas you mean gases, like O2 and CO2, it's the lungs.
They use their blowhole
Toads breathe through their skin with whats called cutaneous gas exchange. They also have lungs for when they're out and about, but when in hibernation or submerged in water, they just use their skin.
because the frogs skin is served as a supplementary organ of gas exchange frogs use their tiny little lungs to breath when they are on land. so if they had huge lungs then they would just be in the way because the whole part of the lung was not in need! :D
Some lower-order animals can also exchange gases through their skin. Frogs, for instance, when they bury themselves in the mud over the winter.
Some animals have to use their entire outer skin layer as a gas exchange organ such as an earth worm. Oxygen diffuses into a dense net of capillaries lying beneath the skin. Earthworms and other "skin breathers" must live in damp places or in water because their whole body surface has to stay moist. Animals that breathe only through their skin and lack specialized gas exchange organs are generally small, and many times are long and thin or flattened. Small size or flatness provides a high ratio of respiratory surface to body volume, allowing for sufficient gas exchange for the entire body.
gills