| Term | Definition |
|---|
| dorsal | back of an animal with bilateral symmetry |
| ventral | belly side of an animal with bilateral symmetry |
| anterior | front end of an animal with bilateral symmetry |
| posterior | back end of an animal with bilateral symmetry |
| open circulatory system | transport system in which body fluids flow through cavities |
| closed circulatory system | transport system in which body fluids are always found within a vessel |
| endoskeleton | internal support system |
| exoskeleton | external support system made of chitin |
| segmentation | allows greater specialization |
| cephalization | concentration of nervous tissue and sensory structures in the anterior portion of the animal |
| chordata | phylum characterized by a dorsal nerve chord, notochord, post anal tail and pharyngeal slits |
| reptiles | first class of vertebrates to produce amniotic egg |
| mammals | produce milk to feed young |
| ectothermic | environment impacts internal body temperature |
| endothermic | uses metabolic heat to keep body temperature constant |
| amphibian | adults use lungs and skin as respiratory surfaces |
| arthropods | organisms have "jointed appendages" |
| monotremes | mammals that lay eggs |
| marsupials | mammals in which part of the development of young happens in a pouch |
| placentals | young retrieve nutrients from mother through placenta |
Combine with other sets
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