Hobbies And Interests
Legs and Vocal Sacs
A frog can leap 20 times its body length, and it has its legs to thank. The front legs have four toes while the back legs have five. The frogs legs have evolved to correspond with its natural habitat. An aquatic frog has long legs and webbed toes for swimming, while a land frog has short legs. Tree frogs have suction cup-like growths on their toes to help grip trees.
Almost as impressive as the frogs legs are their vocal sacs, which are responsible for the frog's croak. The vocal sacs are one or two skin pouches that produce sound as when air is pushed over the frogs vocal chords into the sacs.
Eyes and Tongue
Frogs have amazing eyes. Because they are bulbous and positioned on top of the head, a frog is able to submerge almost its whole head in the water, leaving its eyes exposed to watch for prey, although the frog's eyes can't actually see as it is snagging its prey. Frogs are able to see many colors, even in dim light, and are able to see in several directions without turning their heads. A frog's eyes even help them to push food down their throats.
A frog's tongue also helps it catch prey, although not all frogs have tongues. Tongueless frogs grab prey with their fingers. The frog's tongue grabs prey while their weak teeth trap the prey. The eyes then help push the prey down.
Skin and Poison Glands
A frog's skin helps them breathe and drink water. While a frog has lungs, the skin helps bring extra oxygen into its lungs. Frogs need to stay moist and their skin secretes a mucus that keeps them moist. Every week or so, a frog sheds its skin and typically eats it.
All frogs have poison glands underneath their skin. Some have low levels of poison that does not really deter predation, however there are species of frogs, typically found in South America, that are extremely poisonous.
Circulatory and Nervous Systems
The frog has a three chambered heart, part of its circulatory system. The frog's heart has two atria and one ventricle to prevent the mixing of oxygenated blood from non-oxygenated blood.
Frogs also have amazing hearing and sense of smell, part of the nervous system. A frog hears high pitched noises with ears that are located behind their eyes. They also have a fine tuned sense of smell that allows them to detect chemicals and helps them find prey.