| A | B |
|---|
| cnidaria | name of the phylum of hydra and jellyfish |
| basal disk | structure that hydra has to attch itself to object in water |
| endoderm | second true cell layer that appears first in the cnidarians |
| mesoglea | jelly-like third layer of cnidarians between epidermis and endodermis |
| gastrovascular cavity | hollow sac-like body cavity where digestion occurs |
| hypostome | single openeing in top of hydra-another name for the primitive mouth |
| tentacles | armlike structures surrounding mouth |
| nematocyst | stinging part of cells used in food-getting, anchoring, and defense |
| cnidoblast | stinging cell - contrains nematocyst |
| epithelionutrive cell | a gland cell that lines gastrovascular cavity that accomplished intracellular digestion |
| incomplete digestive system | digestive system with only a mouth opening and lacking an anal opening |
| nerve net | a type of primitive nervous system in the hydra to coordinate movement |
| muscle fibers | beginning of the muscular system that is responsible for movements |
| ovaries | stryctyre tgat secretes female egg cells |
| eggs | the femal reproductive cells |
| testes | structure that secretes the male sperm cells |
| sperm | the male reproductive cell |
| polyp | asexually reproducing body of the jellyfish that is sessile and tubular in shape |
| medusa | free living sexually reproducing form of jellyfish |
| planula | young of the jellyfish in polyp form-the larvae |
| larvaue | immature young of an organism that does not resemble the parent |
| hydrozoa | class of hydra, obelia, and Portugues Man of War |
| scyphozoa | class of the jellyfish |
| anthozoa | calss of the sea anemone and coral |
| alternation of generations | one organism capable of reproducing sexually and asexually, etc |
| ballooning | method of locomotion in the hydra that involves floating on a bubble of air |
| somersaulting | method of locomotion in which the hydra flips along the bottom of the water |
| enzymatic gland cell | secretes the enzymes into the gastrovasular cavity to accomplish extracellular digestion of food |
| extracellular digestion | type of digestion that occurs outside of the cell and in the gastrovascular cavity |
| intracellular digestion | type of digestion that occurs within the cells of the body |
| sensory cell | detects touches to various parts of the body. More concentrated on the upper third of the body |
