| Term | Definition |
|---|
| transition from water to land | water content of body, oxygen concentration, density and support, climatic fluctuation |
| early tetrapods | arose from Sarcopterygian ancestor |
| locomotive and respiratory evolution | vascularized lungs, powerful jointed limbs |
| Amphibia structure | four limbs, skeletal frame |
| Amphibia respiration | lungs, internal nostrils |
| Amphibia circulatory | three-chambered heart |
| Amphibia sensory | ears, eyes, nasal cavity modified for sensory reception in air |
| Amphibia membrane | smooth, moist skin |
| orders of Amphibia | Caecilians, Salamanders, Frogs & Toads |
| Amphibia numbers | ~4200 species |
| metamorphosis | aquatic larva becomes terrestrial adult |
| dependency on water | to avoid dessication |
| Caecilian structure | limbless and tailless |
| Caecilian habitat | fossorial (burrowing) in tropical climates |
| Caecilian sensory | small eyes or blind, sensory tentacle on head |
| Salamander structure | tail, four limbs |
| Salamander diet | carnivorous |
| considerable variation in Salamander | mode of respiration and life history |
| Salamander habitat | common in North America |
| Frog & Toad structure | tailed larvae, tailless adults |
| Frog & Toad locomotion | specialized for jumping |
| Frog & Toad males | set up territories, use sound for courtship |
| Frog & Toads in the environment | indicator species for environmental changes |
| Frog respiration | skin, buccal cavity, lungs, vocal cords |
| Frog circulation | closed system, three-chambered heart, separate pulmonary and systemic circuits |
| Frog reproduction | external fertilization (amplexus), eggs laid in water, lungs develop and gills reabsorb |
Combine with other sets
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