Class Amphibia limbs with girdles of bone (adaptation for walking on land) a tongue used for catching prey and for sensory input eyelids (keep eyes moist)

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Amphibian- “Double Life” - Water and land

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Class Amphibia limbs with girdles of bone (adaptation for walking on land) a tongue used for catching prey and for sensory input eyelids (keep eyes moist) ears for detecting sound in air larynx adapted for vocalization skin (glands, no scales) active in osmotic balance & respiration lung used exclusively for gas exchange reproduction in water (external fertilization three chambered heart (2 atria, 1 ventricle)

Amphibian Circulation

Class Amphibia Order Gymnophiona (Caecilians) Order Caudata (Salamanders) Order Anura (Toads and Frogs)

internal fertilization The Caecilians Order Gymnophiona worm-like amphibians limbless carnivores internal fertilization tropical

Reduced eyes

Reproduction carry eggs lay eggs

The Salamanders tailed, paired limbs carnivores bend side-to-side metamorphic neoteny

Three Types of Salamanders terrestrial entirely aquatic amphibious Respiration through skin

Salamander Reproduction

Paedomorphosis (Neotony)

The Toads and Frogs no tails carnivores metamorphic no neoteny

Reproduction amplexus

Conservation Issues Wetland Loss Deformations