| A | B |
|---|
| Animalia | heterotropic, multicellular, lack cell walls, require energy |
| Tissues | 1st innovation in body plan. |
| Animals | exhibit some type of symmetry. |
| Porifera | sponges |
| sponges | simple, multicellular animals, reproduces by budding, regeneration, or gemmules and gametes; hermaphrodies |
| Sponges | protective skeleton of calcium and filter feed |
| Coelenterates | hydra, jelly fish, and Cnidarians |
| Coelenterates | radial symmetry, nemotacysts, tentacles |
| Nematoda | Ascaris, Trichinella, Hookworms |
| Nematoda | free living in soil and water; causes Trichinosis |
| Anterior | front or head end of organism |
| Posterior | tail or back end of an organism |
| Ventral | belly side of an organism |
| Dorsal | back side of an organism |
| Mollucsa | snails and bivalves; gills for respiration |
| snails | use radula to feed |
| mussels | three body regions: head, visceral mass, and mantle |
| Univalves | snails (gastropods) one shell |
| Bivalves | mussels (two shells) |
| No Shell | octopus |
| Platyhelminthes | planaria, tapeworms, liverflukes |
| snails | move by a large foot |
| Echinoderm | starfish, sea urchins, sea cucumbers |
| Echinoderm | radial symmetry |
| endoskeleton found in Echinoderms | internal skeleton of small calcium plates |
| Echinoderms | lack a brain but have eyespots on the end of rays |
| starfish | have tube feet to pull themselves along |
| Echinoderms | series of ring and radial canals which make up the water vascular system |
| Annelida | earthworms, leeches, and hookworms |
| Annelida | segmented bodies, bilateral symmetry, closed circulatory system, excretory system of specialized organs called nephridum |
| earthworms | continuous tube with organs |
| earthworm organs | pharynx, esophagus, crop, gizzard, intestine, and anus |
| clitellum | swollen area on earthworms where reproductive organs are located |
| earthworms | helpful |
| leeches | harmful |
