| A | B |
|---|
| Vertebrate | animal with a backbone |
| Invertebrate | animal without a backbone |
| Physical Characteristics | a body part or feature |
| Multi-cellular | many cells |
| Heterotroph | an animal that cannot make its own food |
| Homoeostasis | regulation of an organism's , life maintaining conditions; balance |
| Endoskeleton | supportive framework of bone and/or cartilage that provides an internal place for muscle attachment and protects a vertebrates internal organs. |
| Ectotherm | vertebrate animal whose internal temperatue changes when the temperature of the environment changes; cold-blooded animal |
| Endotherm | vertebrate animal with a nearly constant internal temperature; warm-blooded animal |
| Exoskeleton | thick, hard outer covering thatt protects and supports arthropod bodies and provides places for muscles to attachi |
