12. How different is the fish
epidermis from the amphibian
epidermis?

Gap-fill exercise

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The fish epidermis very thin and
mucus-secreting cells. The
skin does not keratin. The
mucus a protective function it
also helps sliding of the
under water. (The scales originate
from dermis and not the
epidermis.)

In there is already slight
keratinization of skin, probably an
adaptation to the
environment. Amphibians have
and wet epidermis scales. These
features their cutaneous
respiration.