What special features do amphibians have?

Answer 1

Does this animal have an internal\external skeleton? Amphibians are Vertebrates (internal) animals, they all have a backbone. What does this animal use to move around? Mainly all Amphibians use their legs or tails to move around. What sort of body covering does the animal have? Amphibians have moist skin with no hair or scales even though they mainly live in water. How does this animal produce offspring? Amphibians produce eggs in water and\or wet land. Amphibian's eggs don't have a shell around the outside. Describe an interesting face about this group of animals... Amphibians have a very large tongue which can be extended out far while feeding. There are about 3200 species of amphibians, they usually start their life in water and they have changing body temperatures.

Answer 2

Amphibians are four-legged, cold-blooded vertebrates who generally spend part of their time on land. Their skin must be kept moist, so they live close to water. Amphibians do have lungs, but are also able to "breath" through their skin. They do not have amniotic eggs. Amniotic means that the sac that the embryo is in is not filled with serous fluid.

An amphibian starts its life as an aquatic animal, breathing under water. It changes, develops legs and the ability to breathe out of the water. By that time it looks like a small version of the terrestrial/land dwelling form of the amphibian.

Not all amphibians have slippery skin, are slimy and have webbed feet. For example California newts have a rough texture to their skin and their skin is dry.

• Skeleton mostly bony, with varying number of vertebrae; ribs present in some, absent in others.
• Body forms extremely varied - elongated trunk with distinct head, neck and tail to a compact, depressed body with a fused head and trunk and no intervening neck.
• Usually four limbs although some are legless.
• Skin smooth and moist with many glands, some of which may be poison glands; pigment cells common, no scales.
• Mouth usually large with small teeth in upper or both jaws; two nostrils open into anterior part of mouth cavity.
• Respiration by lungs (absent in some salamanders), skin and gills in some, either separately or in combination; external gills in the larval form and may persist through life in some.
• Circulation with three-chambered heart, two atria and one ventricle, and a double circulation through the heart; skin abundantly supplied with blood vessels.
• Ectothermal.
• Excretory system of paired mesonephric kidneys; urea main nitrogenous waste.

Answer 3

Most amphibians dont have any kind of care for their offspring, in fact most species of frogs are cannibalistic and will eat their young! There are some exceptions like some dart frogs. The young are fed unfertilised eggs and are sometimes carried on the back of ther dad to another pool. Several groups of frogs protect ther eggs by carrying them in ther mouths, in holes in their back (Surinam toad) or in pouches on their back (Flectonotus).

Answer 4

They can live on both land and water throughout their lives.