Mouth of a frog

Mouth of a frog
Mouth of a frog: web-footed amphibian which lives near lakes and ponds. Moves by swimming and jumping.
Vomerine teeth: teeth set in the frog's vomer.
Gullet opening: the beginning of the opening of the second part of the digestive tract.
Vocal sac opening (male): opening of the sac related to the voice of the male frog.
Tongue: taste organ of the frog, which is also used to capture prey.
Glottis: opening of the larynx.
Eustachian tube opening: opening at throat level that is connected to the ear.
Maxillary teeth: teeth set in the jaw of the frog.
Internal nostril: orifices of the respiratory tract in the frog's mouth.

Photo :

EN : Amphibian
FR : Amphibia
ES : Amphibia


Amphibians, class Amphibia, such as frogs, toads, salamandesr, newts, and gymnophiona, are cold-blooded animals that metamorphose from a juvenile, water-breathing form to an adult, air-breathing form. Typically, amphibians have four limbs. Unlike other land animals (amniotes), amphibians lay eggs in water, as their fish ancestors did. Amphibians are superficially similar to reptiles. For the purpose of reproduction most amphibians are bound to have fresh water. A few tolerate brackish water, but there are no true seawater amphibians. Several hundred frog species in adaptive radiations, however, do not need any water whatsoever. They reproduce via direct development, an ecological and evolutionary adaptation that has allowed them to be completely independent from free-standing water. Almost all of these frogs live in wet tropical rainforests and their eggs hatch directly into miniature versions of the adult, passing through the tadpole stage within the egg. Several species have also adapted to arid and semi-arid environments, but most of them still need water to lay their eggs. Symbiosis with single celled algae that lives in the jelly-like layer of the eggs has evolved several times. The larvae breathe with exterior gills. After hatching, they start to transform gradually into the adult's appearance. This process is called metamorphosis. Typically, the animals then leave the water and become terrestrial adults, but there are many interesting exceptions to this general way of reproduction.

Animation : Water Holding Frogs

Thanks to YouTube for allowing us to watch this video.