Cutaneous respiration
The skin of amphibians is a major site of respiration in all species for which measurements are available. Cutaneous respiration is the sole respiratory mode of lungless salamanders (family Plethodontidae) which lack lungs entirely yet constitute the largest family of salamanders. Cutaneous respiration in frogs and other amphibians may be the primary respiratory mode during colder temperatures.
Megalodiscus temperatus
The reproduction of "Megalodiscus temperatus" are displayed in the stomach and rectum of frogs and tadpoles. The snails that are diffused with miracidia releases cercariae into the water to penetrate the skin of frogs. The frogs regularly cast off the outer layers of the skin which results in their exposure to metaceriae. The metaceriae remains in the rectum of the frog and matures in the time span of four months. Tadpoles are less commonly infected, but when infected they are infected by the ingestion of cercaria. Through the process of metaphorphosis, "Megalodiscus temperatus" travels primarily from the anterior to the posterior of the rectum.