Question

How does air enter the frog's mouth when it's closed?

Answer 1

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✔✔ While completely submerged all of the frog's repiration takes place through the skin.

✔✔ The skin is composed of thin membranous tissue that is quite permeable to water and contains a large network of blood vessels.

✔✔ The thin membranous skin is allows the respiratory gases to readily diffuse directly down their gradients between the blood vessels and the surroundings.

✔✔ When the frog is out of the water, mucus glands in the skin keep the frog moist, which helps absorb dissolved oxygen from the air.

✔✔ A frog may also breathe much like a human, by taking air in through their nostrils and down into their lungs.

✔✔ The mechanism of taking air into the lungs is however sligthly different than in humans.

✔✔ Frogs do not have ribs nor a diaphragm, which in humans helps serve in expand the chest and thereby decreasing the pressure in the lungs allowing outside air to flow in.



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@BinDaSSboY

Answer 2

A frog may also breathe much like a human, by taking air in through their nostrils and down into their lungs. ... Then the nostrils open allowing air toenter the enlarged mouth. The nostrils then close and the air in the mouth isforced into the lungs by contraction of the floor of the mouth.