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Amphibians. 7th Grade Life science. Amphibian Characteristics. From greek amphibios = double life Ectotherms -- Hibernation & Estivation Moist smooth skin 3 chambered heart as adults. Animal kingdom. Chordate Phylum. Subphylum Vertebrata. Class Amphibians. Order = Caecillians.

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amphibians

Amphibians

7th Grade Life science

amphibian characteristics
Amphibian Characteristics
  • From greek amphibios = double life
  • Ectotherms --Hibernation & Estivation
  • Moist smooth skin
  • 3 chambered heart as adults
slide3

Animal kingdom

Chordate Phylum

Subphylum

Vertebrata

Class

Amphibians

Order = Caecillians

Order = Anura

Frogs and Toads

Order = Caudata

(salamanders)

frog life cycle
Frog Life Cycle

Metamorphosis

Meta = change / Morph = shape

differences between frogs and toads
Frogs

Highly permeable skin that generally needs to stay very moist.

Toads

Have thicker skin and are better adapted to life away from water.

Differences between Frogs and Toads
frog anatomy
Frog Anatomy

Nictitating

Membrane

Tympanic

Membrane

Dark Camouflaged Back

external anatomy
External Anatomy
  • Nictitating membrane--clear eyelid
  • Tympanic Membrane-- separates the outer environment from the inner ear.
  • Dark camouflage coloration
mouth anatomy
Mouth Anatomy

Maxillary Teeth

Tongue

Gullet

Mandible

digestive tract
Digestive Tract
  • Mouth --> Pharynx --> Stomach --> Small Intestine --> Large Intestine --Cloaca
  • Small Intestine--nutrient absorption and digestion
  • Large Intestine--digests bacteria, reabsorbs water and forms feces
  • Liver--produces bile for digestion
  • Gall Bladder--stores liver bile
ventral anatomy
Ventral Anatomy

Liver

Small

Intestine

Gall Bladder

ventral frog view
Ventral Frog View

Fat Bodies

Small

Intestine

Liver

circulatory system
Circulatory System
  • 3 chambered heart (left/right atrium; ventricle)
  • Veins = Oxygen poor blood

Artery = Oxygen rich blood

Right Atrium

Ventricle

Left Atrium