The difference between 皮膚【ひふ】 and 皮【かわ】


What's the difference? I got told that 皮膚【ひふ】 only works for mammals (and
humans), and 皮【かわ】 for other animals too.




皮膚{ひふ} is generally a formal word for skin, used in academics, clinics etc.
(but also frequently in everyday speech).

For example, some fishes do 皮膚{ひふ} 呼吸{こきゅう}. So it's not really for mammals
only.

My layman definition is that it has to be on an animal, and doesn't include
extra structures like hairs, feathers, scales etc. (but does include the
smooth underlying tissue).

皮{かわ} is more colloquial and can refer to any organic, generally thin
structure that can be peeled. For example, 木{き}の皮{かわ}.




皮膚{ひふ} is generally a formal word for skin, used in academics, clinics etc.
(but also frequently in everyday speech).

For example, some fishes do 皮膚{ひふ} 呼吸{こきゅう}. So it's not really for mammals
only.

My layman definition is that it has to be on an animal, and doesn't include
extra structures like hairs, feathers, scales etc. (but does include the
smooth underlying tissue).

皮{かわ} is more colloquial and can refer to any organic, generally thin
structure that can be peeled. For example, 木{き}の皮{かわ}.

