According to Wildlife Singapore, a frog croaks by forcing air out of its lungs and through its larynx. When air is forced through the larynx, the frog's vocal cords vibrate and create a croaking sound.Know More
Wildlife Singapore says the croaking sound that frogs make is amplified by vocal sacs, which are pouches under the floor of a frog's mouths. Frogs are able to amplify the sound of their croaks by keeping their mouths and nostrils shut. By using the muscles in their throats and the walls of their bodies, frogs can force air back and forth between their vocal sacs and their lungs. This is also the reason why the croaking of a frog is rhythmical.
According to Wildlife Singapore, male frogs are the only ones that croak. They use the sound to repel other male frogs from their territory and to attract females. Paw Nation says female frogs also emit a vocalization for breeding. However, the vocalization is very quiet and often cannot be heard over male frogs. A paper published in 1999 called “Brain, Behavior and Evolution,” shows that the mating call of a female frog is more similar to the release call that a male frog makes than to a male frog's mating call.Learn More
A frog's gullet is its throat or esophagus; this is the passage from the mouth to the digestive system. If a frog's digestive process is seen as a series of steps, passage of food from the mouth to the gullet can be seen as the second step in digestion.Full Answer >
A frog's skeleton is divided into four major sections: the skull, the spine, the forelegs and the legs. While a frog's arms and legs are similar to those of a human, its skull and spine are markedly different.Full Answer >
The poison dart frog has only one natural predator - a snake named Leimadophis epinephelus. Because the skin of the poison dart frog has enough poison to make many other animals sick by just licking it, the poison dart frog has only this one predator who has become adapted to its poison. Termed aposematic coloration, the poison dart frog's bright colors warm other animals to stay away.Full Answer >
The frog heart has three chambers, two atria that take blood from the body and one ventricle to pump it out, according to the University of Wisconsin-La Crosse's Zoo Lab. It relies on spiral valves to move the blood to the right places. Because there is only one ventricle, there is some mixing of oxygenated and deoxygenated blood, but a groove through the ventricle helps minimize it.Full Answer >