| A | B |
|---|
| Stingers found in the stinging cells of cnidarians | Nematocysts |
| bell shaped | medusa |
| another name for collar cells | choanocyte |
| part of a nervous system that carries signals and controls body movements | nerves |
| openings in the sponge that allow water to circulate | pores |
| attached to a surface and does not move | sessile |
| circulatory system with blood vessels | closed circulatory system |
| plylum that contains centipedes, milipedes, arachnids, insects, and crustadeans | arthropods |
| special place in body for the gut i n which other organs are also located | Coelum |
| protein fibers of soft sponges | spongin |
| Class with optopus and squid | cephalopod |
| opening in which wastes are excreted in more complex animals | anus |
| pouch lined with vells that produce digestive enzymes. Area where digestion takes place | gut |
| spaces in which blood collects in some mollusks | sinus |
| phylum that contains roundworms | nematoda |
| cells in a sponge that digest and take in oxygen | collar cells |
| opening at the top of the sponge | Osculum |
| circulatory system with no blood vessels | open circulatory system |
| Phylum that contains sponges | porifera |
| phylum that contains segmented worms | annelida |
| material that forms the skeleton of hard sponges | spicules |
| organism that has cells with a nucleus and membrane bound organelles | eukaryote |
| phylum that contains flatworms | platyhelminthes |
| organisn that must eat other organisms to get nutrients. A consumer | Heterotroph |
| Class with snails and slugs | Gastropods |
| Class with clams and oysters | Binalve |
| stinging cells on a jellyfish's tentacles | cnidocyte |
| organism in its early stages of development | Embryo |
| fertilized egg | zygote |
| nerve cells that come together in groups | ganglia |
| phylum with snails, slugs, clams, oysters, octopuses, and squid | Molluska |
| Jellylike layer in jellyfish | Mesoglea |
| Some flatwors use these to sense light | eyespot |
| flexible structures with stinging cell. Cnidarians use these to capture prey. | Tentacles |
| Whip-like tails on collar cells that move water in and out of sponge | Flagella |
| Phylum that contains sea stars, sea urchins, sanddollars, and brittle stars | Echinodermata |
| Some flatworms use these to sense food | Sensory Lobes |
| Vase shaped | Polyp |
| Organ that controls the nervous system of more complax animals | Brain |
| phylum that contains jellyfish, hydra, coral, and sea anemone | cnidaria |
