| A | B |
|---|
| Blastula | After several divisions a hollow circular ball of cells forms circular |
| Gastrula | The hollow ball folds inward and it now looks like horseshoe The outside cells forms the skin and muscle – the cells that are pulled inside become the internal organs |
| Larva | The stage before adulthood, look worm like whereas adults will look totally different |
| sponges | lack organs, live in ocean, reproduce sexually and asexually |
| Collar cells | cells inside of the sponge, they have a flagella catches food for digestion |
| Sessile | means they are rooted to one spot once they start to grow |
| Cnidaria | radial symmetry, jelly fish,sea anemones,coral, hydra |
| Nematocytes | specialized stinging cells |
| Gastrovascular sac | openning where food goes in and waste is released |
| Medusa | phase of life floating - reproductive phase jellyfish |
| Polyp | this is the phase of their life that they are anchored to the ground, it is the asexual portion of their life |
| flat worms | bilateral symmetry, complete digestive system, still one openning |
| 3 types of flatworms | tape worms, flukes, Planarians |
| round worms/nematodes | has complete disgestive, mouth and anus |
| types of round worms | hook worm, whip worm, round worm, pin worms |
| Annelids/segmented worms | closed circulatory heart and vessels, distinct head and tail |
| types of segemented worms | earth worms and leeches |
| mollusks | have strong muscular foot, most have shells and soft bodies |
| types of mollusk | snails, slugs, octopus, squid |
| mantle | produces shell also also used for respiration, waste removal, contains the gills and for sensing |
| Radula | specialize teeth |
| Gastropods | single shell snails slugs |
| Bivalves | two hinged shells, clams, mussels, oysters |
| Cephalopods | internal shell (beak) octopus, squid |
| Echinoderms | radiate from center, endoskeleton, tube feet |
| tyeps of echinoderms | Sea stars, sea urchins, sea cucumbers |
