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Q. How different is the fish epidermis from the amphibian epidermis?
The fish epidermis is very contains and thin mucus-secreting cells the fish skin doesn't present keratin, the mucus has a protective function and it also helps the sliding of the animal under water, the fish scales originate from the dermis and not from the epidermis.
In amphibians there is already a slight keratinization of the skin probably an additional adaptation to the terrestrial environment. Amphibians have wet and smooth epidermis without scales, these features facilitates their cutaneous respiration.
Q. To which heart chamber does the blood go after leaving the left atrium? What is the valve that separates these compartments? The valve between the left atrium and the left v
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fish liver oil is rich in which vitamin ???
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