frog

Frogs belong to amphibians of chordate phylum, Amphibia, Anura and Ranae. The adults have no tails, the eggs are produced in water, fertilized in vitro, hatch into tadpoles, breathe with gills, and after variation, the adults breathe mainly with lungs and also with skin. The upper jaw has teeth, usually with vomersal teeth. Shoulder strap chest fixation type, vertebral body uneven type, sacral transverse process columnar; There is no interposed cartilage between the two bone internodes at the end of the finger and toe. The tympanic membrane is obviously hidden under the skin, and the skin is smooth or warty. The tongue is generally long and oval, and the back end is mostly notched