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Warty frog species tend to be called toads, but the distinction between frogs and toads is informal, not from taxonomy or evolutionary history. An adult frog has a stout body, protruding eyes, anteriorly-attached tongue, limbs folded underneath, and no tail (the tail of tailed frogs is an extension of the male cloaca
The largest frog is the African Goliath frog (Conraua goliath), which can reach 32 cm (13 in) and weigh 3 kg (6.6 lb). [ 41 ] Amphibians are ectothermic (cold-blooded) vertebrates that do not maintain their body temperature through internal physiological processes.
The frog is triangular in shape, and extends midway from the heels toward the toe, covering around 25% of the bottom of the hoof. [1] [page needed] The frog is a V-shaped structure that extends forward across about two-thirds of the sole. Its thickness grows from the front to the back and, at the back, it merges with the heel periople.
The hairy frog is also notable in possessing retractable "claws", which it may project through the skin, apparently by intentionally breaking the bones of the toe. [5] These are not true claws, as they are made of bone, not keratin. In addition, there is a small bony nodule nestled in the tissue just beyond the frog's fingertip.
A frog with a cold body temperature has muscles that move more slowly, but it can still attack prey with the same speed as if its body was warm. Ballistic tongue projection of the related leopard frog is possible due to the presence of elastic structures that allow storage and subsequent release of elastic recoil energy .
Hoplobatrachus tigerinus, commonly known as the Indian bullfrog, is a large species of fork-tongued frog found in South and Southeast Asia. A relatively large frog, it is normally green in color, although physiological traits vary between populations. Sexual dimorphism exists between males and females.
Xenopus (/ ˈ z ɛ n ə p ə s / [1] [2]) (Gk., ξενος, xenos = strange, πους, pous = foot, commonly known as the clawed frog) is a genus of highly aquatic frogs native to sub-Saharan Africa. Twenty species are currently described within it.
The equine heart is a muscular pump that circulates blood throughout the body. It is more globoid in shape than the human heart and consists of four chambers: the left and right atria, and the left and right ventricles. The average adult horse has a 3.6-kilogram (7.9 lb) heart, although it can be more than twice this size.