| A | B |
|---|
| gizzard | grinds food |
| crop & rumen | store food |
| oviparous | eggs hatch outside body |
| ovoviviparous | eggs hatch inside body |
| viviparous | embryos in mother; live young born |
| contour feather | lift & balance |
| down feather | provides warmth |
| # of chambers in a fish heart | 2 |
| # of chambers in a bird heart | 4 |
| # of chambers in a reptile heart | 3 or 4 |
| # of chambers in amphibian hearts | 3 |
| kidneys | filter wastes |
| cloaca | wastes, sperm, & eggs exit here |
| amniotic egg | reptiles & birds lay these |
| monotremes | mammals that lay eggs |
| marsupials | mammals with pouches |
| placental mammals | embryos get nourishment from placenta |
| air sacs | found only in birds |
| cerebellum | muscle coordination |
| medulla oblongata | involuntary movement |
| swim bladder | helps fish move up & down |
| fish | scales, fins, gills |
| amphibian | moist skin, aquatic eggs, lungs & gills |
| reptiles | scales, ectotherms, amniotic eggs |
| birds | feathers, wings, endotherms |
| mammals | hair, endotherms, mammary glands |
| endotherm | produces its own body heat |
| ectotherm | internal temp. same as surroundings |
| Chondrichthyes | cartilage only like sharks |
| Osteichthyes | have bones like trout |
| Testudine | turtlkes & tortoises |
| Sphenodonta | tuatara |
| Crocodilia | Alligators, crocodiles, caimans |
| Squamata | snakes & lizards |
| Agnatha | jawless fishes like lampreys |
| notochord | becomes the backbone |
| dorsal hollow nerve cord | becomes the spinal cord |
| pharyngeal pouches | become gills |
| nonvertebrate chordates | tunicates & lancelets |
| cerebrum | thinking & learning |
