| A | B |
|---|
| sponges | have incurrent and excurrent pores |
| flagellates | used for movement of water into and out of sponge in order to capture food |
| sessile | not moving; attached to rock or ocean floor |
| spicules | mineral structures that support a sponge |
| invertebrate | without a backbone |
| Porifera | phylum of sponges |
| hermaphrodites | having both male and female sex organs |
| asexual reproduction | reproduction involving only one parent |
| gemmules | groups of cells that have a tough outer covering and can produce new cells when conditions are bad |
| coelenterates | corals, jellyfish, sea anemones |
| mesoglea | jelly-like layer found in coel |
| polyp | a coelenterate with a cylindrical body form, is usually sessile, and has a mouth that faces upward |
| medusa | a coelenterate that is free swimming, with mouth facing downward |
| endoderm | inner cell layer |
| ectoderm | outer cell layer |
| nematocysts | stinging cells that paralyze the prey of a coelenterate |
| radial symmetry | symmetry found in a round or cylindrical shape |
| bilateral symmetry | symmetry that results in a mirror image of both sides when cut through the center |
| flatworms | Platyhelminthes |
| cutting | regeneration of any body part in a Planaria |
| regeneration | how Planaria reproduce |
| hookworm | enters through cuts in bare feet |
| filaria | causes elephantiasis; transmitted by mosquitoes |
| ascaris | lives in human intestines |
| segmented worms | Annelids |
| castings | soil that has passed through the body of an earthworm |
| parapods | little legs with little feet found on Nereis |
| leeches | aquatic parasite that suck blood from its host |
| mollusks | have soft bodies, move with foot, most are marine |
| univalve | a class of mollusk that has one shell and has tentacles as sensory organs (snail, slug) |
| bivalve | a class of mollusk that has 2 shells and are sessile (clams, osters, scallops, mussels) |
| head-foot mollusk | class of mollusk; largest invertebrates, slow-moving, (octopus, squid) |
| radula | mouth structure |
