| A | B |
|---|
| Invertebrates | Animals that lack a backbone |
| Vertebrates | Animals that possess a backbone |
| Phylum Cnidaria members | Hydra, sea anemone, jellyfish |
| Sea anemones | Clownfish seek refuge in these. |
| Bilateral symmetry | The kind of symmetry humans have |
| Epidermis | An outer layer of cells designed to provide protection |
| Animalia | The kingdom that sponges, worms, and coral belong to |
| Taxonomy | the practice and science of classification |
| Chordata | The phylum that we are in |
| Phylum Annelida | The phylum earthworms are in |
| Earthworms | Have blood, nervous system, and tiny brain |
| Flatworm | Another name for planarian |
| Phylum Platyhelminthes | Tapeworms and flukes are members |
| Trichinosis | Disease that comes from pork or other game animals |
| Phylum Mollusca members | Clams, osters, snails, and squid |
| Testes | The organ that produces sperm |
| Ovaries | The organ that produces eggs |
| Anterior end | The end of an animal that contains its head |
| Posterior end | The end of an animal that contains the tail |
| Circulatory system | A system designed to transport food and other necessary substances throughout a creature's body |
| Nervous system | A system of sensitive cells that respond to stimuli such as sound, touch, and taste |
| Ganglia | Masses of nerve cell bodies |
| Hermaphroditic | Possessing both the male and female reproductive organs |
| Regeneration | The ability to re-grow a missing part of the body |
| Snail | Moves by laying down a thin layer of slime upon which it glides by rhythmically contracting its foot. |
| Shell | A tough, multilayered structure secreted by the mantle. It is usually used for protection, but sometimes for body support |
| After a heavy rain | The best time to look for earthworms |
| Foot | A muscular organ that is used for locomotion and takes a variety of forms depending on the animal |
| Univalve | An organism with a single shell, e.g., a snail |
| Bivalve | An organism with two shells, e.g., a clam. |
