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27 Cards in this Set

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sessile
otganism permanently attached to ground
Cnidaria
The only phylum to have spear like stinging nematocysts
Scyphozoa
class jellyfish belong to
nerve net
behavioral responce of hydra are due to its...
medusa
bell shaped and free swimming form of cnidarians
cell specialization
adapting of a cell for a particular use
invertibrates
95% animals
class hydrzoa
includes portuguse man of war
# of germ layers cinarians have
2
collar cells
cells that contain flagella to draw water into sponge
epidermis
outer layer which protects sponge
gemmule
bud covered by a hard protective layer
osculum
excurrent pore of sponge where water leaves
Porifera
sponge phylum
germ layers
true body layers from which organs adn organ systems are derived
metazoma
multicellular organisms with organized tissues
bilateral symmatry
left and right mirror each other
budding
type of asexual reproduction where a group of cells enlarge, break off, amd develop into an adult
dinoflagellates
algae that have a symbiosis assosiation with class anthazoa
gastrovacular cavity
stomach cavity of a hydra
polyp
cnidarian body form
spicules
STRUCTURES which act as a skeleton for the sponge
basal disk
group of cells in hydra that secretes a slimy, sticky substance for attaching to rocks adn plants
anthozoa
cnidarians that live only as polys
colloblasts
cells which secrete a sticky substance to capture prey
2 advances of hydra over sponge
mouth , stomach cavity
ameboycytes function in:
feeding, respiration, reproduction