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Amphibians use their skin as a secondary respiratory interface and some small terrestrial salamanders and frogs lack lungs and rely entirely on their skin. They are superficially similar to reptiles like lizards , but unlike reptiles and other amniotes , require access to water bodies to breed.
Their tails are short or absent, and their cloacae are near the ends of their bodies. [8] [9] [10] Except for one lungless species, Atretochoana eiselti, [11] all caecilians have lungs, but also use their skin or mouths for oxygen absorption. Often, the left lung is much smaller than the right one, an adaptation to body shape that is also found ...
Amphibians use their skin as a secondary respiratory interface and some small terrestrial salamanders and frogs lack lungs and rely entirely on their skin. They are superficially similar to reptiles like lizards , but unlike reptiles and other amniotes , require access to water bodies to breed.
Although it is common for amphibia to respire out of their skin, also known as cutaneous respiration, it was found that amphiuma primarily respire through their lungs, despite their aquatic lifestyle. [19] This is suggested by the high lung to respiratory capillary density compared to the relatively low skin to respiratory capillary density ...
Both the lungs and the skin serve as respiratory organs in amphibians. The ventilation of the lungs in amphibians relies on positive pressure ventilation. Muscles lower the floor of the oral cavity, enlarging it and drawing in air through the nostrils into the oral cavity. With the nostrils and mouth closed, the floor of the oral cavity is then ...
External gills are the gills of an animal, most typically an amphibian, that are exposed to the environment, rather than set inside the pharynx and covered by gill slits, as they are in most fishes. Instead, the respiratory organs are set on a frill of stalks protruding from the sides of an animal's head. The axolotl has three pairs of external ...
An adult weighs 1.5 to 2.5 kg (3.3 to 5.5 lb), making them the fifth heaviest living amphibian in the world after their South China, Chinese and Japanese cousins and the goliath frog, while the largest cane toads may also weigh as much as a hellbender. Hellbenders reach sexual maturity at about five years of age, and may live 30 years in captivity.
At both sides of their mouths their lips interlock, which allows them to use suction feeding. [7] They are carnivorous creatures and will eat almost anything they can get into their mouths. Typically, they prey upon animals such as insects and their larvae, mollusks, annelids, crayfish, small fish, amphibians, earthworms, and spiders.