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8/7/2019 Amphibians Copyright
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Amphibians characteristicsy Amphibians spent part of their lives in
water and part on land.y Amphibians are ectotherms. There body
temperature changes when the temperature
of their surrounding changes.y This period during cold weather is called
hibernationy Hibernation is when amphibians that live
in in hot dry inviorments become inactiveand hide in ground when temperaturesbecome too hot.
y And when the weather is estivation itswhen the weather is hot through all of themonths .
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respirationy Amphibians have moist skin that is
smooth , thin and without scales. They
have many capillaries directly beneath theskin and in the lining of the mouth. Thismakes it possible for oxygen and carbondioxide to be exchanged through the skinand the mouth lining they also have smallsimple saclike lungs in the chest cavity forthe exchange of oxygen and carbondioxide.
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Circulationsy The three chambered heart in
amphibians is an importantchange from the circulatory
system of fish. In the threechambered heart , onechamber receives oxygen filledblood from the lungs and skin
,and another chamber.receives carbon dioxide filledblood back to the lungs .
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Reproductiony Amphibians depend on water to
reproduce ,because their eggs need
water which they dont have .yAmphibians eggs are fertilized externally
by the male. After the eggs come out ofthe female body the male releases sperm
over them..y Now many species developed special
reproductive adaptation enabling to
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Importance of
amphibiansy The importance of
amphibians is they live
on land and reproducein water, amphibiansare affected directly bychanges in the
environment ,including pesticidesand other pollution.
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BiOlOgIcAl InDiCaToRsyAs you know amphibians live and reproduce in water.
yAmphibians are affected my the by the changes in the
environment .y Since people dump harmful gases the Amphibians
absorb it through their skin.
y That makes them biological indicators.
Biological indicators are species whose
Overall health indicators the health particle
Of the ecosystem.
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Some Cool Pics of Amphibians
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SummaryAmphibian Characteristics
y Amphibians have two phases of life__ one in water and one
in landy All Amphibians have a three chambered heart, reproduce
in water by laying eggs, and go through metamorphosis.
Types and Importance ofAmphibians
y Frogs and Toads have short, broad bodies
While salamanders have long slender bodies.
y Amphibians are used for food, research, and
Important as Biological indicators.
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Thank you for
watching