Quizlet

Term	Definition
amphibian	ectothermic vertebrate that spends its early life in water, adulthood on land & return to water to reproduce
2 major groups of amphibians	salamanders & frogs and toads
tadpole	larva stage of a frog or toad
difference between salamanders & frogs and toads' fertilization	salamanders have internal fertilization-frogs & toads have external fertilization
difference between salamanders & frogs and toads' metamorphosis	salamander larvae look like adults
lungs	organs of air breathing vertebrates where oxygen and carbon dioxide are exchanged between air & blood
difference between tadpole & adult amphibian circulatory system	Tadpoles have a single loop circulatory system & 2 chambered heart. Adult amphibians have 2 loops & 3 chambered heart.
atria	2 upper chambers of heart that receive blood
ventricle	lower chamber of heart that pumps blood to lungs & body
difference between how tadpole & adult amphibians obtain food	tadpoles are herbivores. Most adult amphibians are carnivores.
adaptations adult amphibians have to move on land	strong skeletons & muscular limbs
adaptations frogs & toads have for leaping	powerful hind-leg muscles & skeleton that can absorb shock of landing
habitat	specific environment in which an animal lives
tadpole

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