Frog Anatomy and morphology
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Transcript of Frog Anatomy and morphology
"Amphibian” comes from the "Amphibian” comes from the Greek meaning "both life". Greek meaning "both life". Amphibians can live on water Amphibians can live on water and on land. and on land.
Scientist infer that Scientist infer that amphibians evolved from amphibians evolved from lobe-finned fishes called lobe-finned fishes called crossopterygians.crossopterygians.
FROG LATIN meaning
KINGDOM _____________
PHYLUM ____________________________
SUBPHYLUM ___________________________
CLASS _______________________________
ORDER _____________________________
ANIMALIA
CHORDATA
VERTEBRATA “backbone”
AMPHIBIA “double life”
ANURA “without a tail”
CharacteristicCharacteristics of Frogs of Frog
Frogs are cold-blooded, which Frogs are cold-blooded, which means their blood temperature means their blood temperature rises and falls with that of the rises and falls with that of the
surrounding environmentsurrounding environment
• ••
They use gills, lungs, skin, and They use gills, lungs, skin, and mouth cavity in respiration.mouth cavity in respiration.
They have moist, smooth, thin skin with no They have moist, smooth, thin skin with no scales.Feet are webbed and the toes lack scales.Feet are webbed and the toes lack
clawsclaws..
Frogs have many prominent characteristics that are Frogs have many prominent characteristics that are adaptations to a life spent both on land and in water:adaptations to a life spent both on land and in water:
They change from an aquatic larval stage to a They change from an aquatic larval stage to a terrestrial adultterrestrial adult
form. This transformation is called metamorphosisform. This transformation is called metamorphosis
Frogs enter a state of dormancy Frogs enter a state of dormancy when conditions are when conditions are unfavorable.unfavorable.They often bury themselves in They often bury themselves in mud or leaves, emerging when mud or leaves, emerging when conditions are better. conditions are better.
Such states of Such states of inactivity are known inactivity are known
as known as:as known as: Hibernation when it Hibernation when it occurs in the winteroccurs in the winter
Estivation when it Estivation when it occurs in the summeroccurs in the summer
HIBERNATION/ ESTIVATION
Images from: http://www.enc.org/Classroom_Calendar/CC_Units/Unit_Images/185.jpg http://www.reptilis.org/pyxi/image5.htm
FAT stored in FAT BODIES provides energy
Thin, moist skin – no scales
Mucous glands make it “slimy”
Camouflage- for protection
Some have poison glands
http://www-binf.bio.uu.nl/dutilh/hall/kikkers.html
Larvae have two-chambered hearts; Larvae have two-chambered hearts; adults have three-chambered hearts and adults have three-chambered hearts and
well-developed circulation.well-developed circulation.
Eggs lack multicellular membranes or Eggs lack multicellular membranes or shells. They are usually laid in water or in shells. They are usually laid in water or in
a moist environment and fertilized a moist environment and fertilized externally.externally.
Classification of Classification of AmphibiansAmphibians
Frogs and toads comprise the Frogs and toads comprise the order Anuraorder Anura
There are about 3,500 known There are about 3,500 known species of frogs and 300 species of frogs and 300
kinds of toadskinds of toads
They are found on every They are found on every continent except Antarcticacontinent except Antarctica