Amphibians Breathe Through Lungs
Although most of the amphibians have lungs, they usually breathe through their skin and lining of their mouth, whereas most reptiles do not.
Amphibians breathe through lungs. Amphibians such as frogs use more than one organ of respiration during their life. Amphibians use their lungs to breathe when they are on land. Most amphibians breathe through lungs and their skin.
Tadpoles breathe through the gills by moving their throat through regular rhythmic movements, known as pulsing. Their skin has to stay wet in order for them to absorb oxygen so they secrete mucous to keep their skin moist (if they get too dry, they cannot breathe and will die). Amphibians have primitive lungs compared to reptiles, birds, or mammals.
Amphibians are able to breathe through the entire surface of their skin or through gills, depending on which set of respiratory system they were born with. Insects do not have lungs, nor do they transport oxygen through a circulatory system in the manner that humans do. When amphibians are young, such as tadpoles, they breath using gills and spiracle.
Air is taken in through the nasal passage or the mouth, it then crosses the palate to the trachea, where the glottis divides the air to both bronchi, from where gas is transported to the lungs. Anura (frogs and toads) and apoda or caecilians. Though in some reptiles the body is adapted to their respective environmental condition like the aquatic turtles developing permeable skin but the process of respiration is not completely executed without the lungs.
When they metamorphose and reach their adult state they start to breathe air out of lungs. This enables them to move from aquatic to terrestrial environments during different seasons. With the exception of a few frog species that lay eggs on land, all amphibians begin life as completely aquatic larvae.
They can also breathe through lungs, according to natural history. Frogs can breathe through their skin while they are in water and when they are on land. When they metamorphose into frogs, they eventually lose their gills and start breathing through the lungs or through the skin.