| Term | Definition |
|---|
| lung | an internal baglike respiratory organthat allows oxygen and co2 to be exchanged between the ari and the bloodstream |
| pulmonary veins | carry oxygen rich blood fromthe amphibian's lungs to its heart |
| double -loop circulation | pulmonary veins brings oxygen to the lungs and another to the body to deliver oxygen- allows more o2 to be delivered to the muscles of amphibians |
| anura | frogs and toads are examples of?-("without a tail"). |
| adult anurians | carnivorous- eating a wide variety of small prey- some species have a sticky tongue that they use to catch prey. |
| metamorphosis | dramatic physical change |
| reproduction in frogs | depend on water to complete their life cycle- female releases eggs into water, male fertilzes them externally, eggs hatch into tadpoles- breath with gills, after a period of growth the tadpole changes into a frog |
| urodela | salamanders-("visible tail"). |
| habitat of salamanders | must keep body moist, can not remain away from water for long periods- some speices manage to live in dry places by remainin inactive during the day |
| reproduction in salamander | lay eggs in water or moist place, fertilization is usually external, young are carnivorous and resemble smaller version of adult, young usually have gills |
| order Apoda | Caecilian- highly specialized group of tropical, burrowing amphibians. They have small bony scales embedded in their skin. they are legless, wormlike animals |
| characteristics of amphibians | cold-blooded,They use gills, lungs, skin, and mouth cavity in respiration,moist, smooth, thin skin with no scales.Feet are webbed and the toes lack claws,metamorphosis, |
| Amphibian" comes from the Greek meaning ____ | Amphibian" comes from the Greek meaning "both life". Amphibians can live on water and on land. |
| Crossopterygian | Scientist infer that amphibians evolved from lobe-finned fishes called |
| torpor | Amphibians enter a state of dormancy _______when conditions are unfavorable |
| Hibernation | state of inactivity that occurs in the winter |
| Estivation | state of inactivity that occurs in the summer |
| Trachystoma | Mud eels |
| Some basic differences between frogs & toads | Some basic differences between them are: toads have dry, warty skin, while frogs have smooth, wet skin. |
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