Keywords: Frogs,Breathe,Under Water,Cold-blooded,Amphibian,Lungs,Frogs Breathe,Frogs Under Water,Frog,Winter,Skins,Nostrils,Mammals,Reptiles,Body Muscles,
3. HOW DO FROGS BREATHE UNDER WATER?
Frogs are cold-blooded. That means they are as warm or as cold as the air or water surrounding them. In winter they hibernate under water, where their body temperature falls, their bodily functions are kept at a minimum and breathing is carried on entirely through the skin.
Under water, frogs breathe through their skins. A frog is an amphibian, That is to say it lives both on land and in water. It has lungs, but it has no ribs and therefore cannot expand its chest and suck air into its lungs as do reptiles, birds and mammals. On land air is drawn in and out of the frog's nostrils, which have valves in them, by pulsations of the floor of the mouth, The air is forced in and out of the lungs by contractions of the throat and body muscles. A frog's mouth is always kept tightly closed and the pulsations of the throat vary from 120-140 a minute.
Even on land the plays a greater part in breathing than the lungs. However, air can be absorbed only through a moist skin. If the skin becomes too dry, the frog will die. There fore the skin contains glands which secrete a clear mucus or slime whose function is to keep the skin moist and supple. The skin absorbs water as well as air, for frogs do not drink.
Keywords: Frogs,Breathe,Under Water,Cold-blooded,Amphibian,Lungs,Frogs Breathe,Frogs Under Water,Frog,Winter,Skins,Nostrils,Mammals,Reptiles,Body Muscles,
3. HOW DO FROGS BREATHE UNDER WATER?
Frogs are cold-blooded. That means they are as warm or as cold as the air or water surrounding them. In winter they hibernate under water, where their body temperature falls, their bodily functions are kept at a minimum and breathing is carried on entirely through the skin.
Under water, frogs breathe through their skins. A frog is an amphibian, That is to say it lives both on land and in water. It has lungs, but it has no ribs and therefore cannot expand its chest and suck air into its lungs as do reptiles, birds and mammals. On land air is drawn in and out of the frog's nostrils, which have valves in them, by pulsations of the floor of the mouth, The air is forced in and out of the lungs by contractions of the throat and body muscles. A frog's mouth is always kept tightly closed and the pulsations of the throat vary from 120-140 a minute.
Even on land the plays a greater part in breathing than the lungs. However, air can be absorbed only through a moist skin. If the skin becomes too dry, the frog will die. There fore the skin contains glands which secrete a clear mucus or slime whose function is to keep the skin moist and supple. The skin absorbs water as well as air, for frogs do not drink.
Keywords: Frogs,Breathe,Under Water,Cold-blooded,Amphibian,Lungs,Frogs Breathe,Frogs Under Water,Frog,Winter,Skins,Nostrils,Mammals,Reptiles,Body Muscles,
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