Amphibians EatingAmphibians Eating

By Mr. “Frogs are Cool” ChapmanBy Mr. “Frogs are Cool” Chapman

AmphibiansAmphibians Amphibians have never been able to

completely leave the water (or at least moist environments).

1. They must return to the water to breed 2. They have to keep their skin moist.

TonguesTongues Tongues of amphibian vary considerably.Tongues of amphibian vary considerably. Some amphibian have no tongues.Some amphibian have no tongues.

Ex. Caecilians Ex. Caecilians Some amphibians have a very long Some amphibians have a very long

tongue with sticky tips.tongue with sticky tips. Ex. Most toadsEx. Most toads

Amphibian tongues in between Amphibian tongues in between

Amphibian FeedingAmphibian Feeding Amphibians catch prey by using?Amphibians catch prey by using?

Their tongueTheir tongue MouthMouth

FeedingFeeding Amphibians catch prey by using?Amphibians catch prey by using?

Their tongueTheir tongue MouthMouth

Once in there mouth, amphibians crush Once in there mouth, amphibians crush their prey with their jaws and swallow it their prey with their jaws and swallow it whole.whole.

Most Amphibians do not have teethMost Amphibians do not have teeth

FeedingFeeding How do amphibians push the food down How do amphibians push the food down

their throat?their throat?

Amphibians use their eyes to push the Amphibians use their eyes to push the food down their throat.food down their throat.

Where They LiveWhere They Live Amphibians are mostly found?Amphibians are mostly found? Wetlands, swamps, or in moist areas.Wetlands, swamps, or in moist areas.

Why do amphibians have to stay moist?Why do amphibians have to stay moist? If their skin dries up they will die.If their skin dries up they will die.

SkinSkin Amphibians skin is considered to be Amphibians skin is considered to be

semi-permeable.semi-permeable. Semi-permeable means liquids and Semi-permeable means liquids and

gases can pass through their skin, but not gases can pass through their skin, but not solids.solids.

If amphibians are in a dry environment, If amphibians are in a dry environment, there is nothing to stop water from there is nothing to stop water from moving out of their body.moving out of their body.

SkinSkin But what happens when they are in water But what happens when they are in water

that has toxic chemicals in it?that has toxic chemicals in it?

The toxins get absorbed into their body The toxins get absorbed into their body with the water and they die.with the water and they die.

Amphibians are considered to be Amphibians are considered to be Bio-IndicatorsBio-Indicators

Bio-IndicatorsBio-Indicators Bio-IndicatorBio-Indicator – is an organism that – is an organism that

indicates whether or not an area is indicates whether or not an area is healthy.healthy.

Amphibians are widely used to figure out Amphibians are widely used to figure out how healthy wetlands are.how healthy wetlands are.

Example: If a pond has lots of frogs, you Example: If a pond has lots of frogs, you would know the water is clean and free of would know the water is clean and free of toxins.toxins.

Reproduction MethodsReproduction Methods OviparousOviparous – egg layers – egg layers

ViviparousViviparous – live birth – live birth

OvoviviparousOvoviviparous – eggs hatch in side – eggs hatch in side mother and the young live in her until mother and the young live in her until maturity.maturity.