Simon Fraser University3 年
Reptiles: scales and the amniotic egg
Skin is used for gas exchange. Thick keratin layer would restrict oxygen exchange and water absorption. Amphibians have many mucus glands to reduce water loss. As a result of this skin, they are ...
Simon Fraser University3 年
Reptiles: scales and the amniotic egg
Skin is used for gas exchange. Thick keratin layer would restrict oxygen exchange and water absorption. Amphibians have many mucus glands to reduce water loss. As a result of this skin, they are ...