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Invertebrates

Across
Cnidarian found mainly in freshwater
External segments of segmented worms
Where water is pulled through a sponge
Inner layer of a sponge
The first life stage a jellyfish goes through
How many layers do annelidas have?
Venom a jellyfish sends out
Where food is stored temporarily in a worm
Do cnidarians have cephalizaton?
Cells between epidermis and the collar cells
Where sperm received from another worm is stored
Bristle on the underside of the earthworm
Are planarians hermaphrodites?
Reproductive sections of a flatworm
Material between germ layers of a jellyfish
Budding, gemmules, and regeneration are ways of reproducing ____
What do cnidocytes have that when touched send out nematocyst?
Do sponges have cephalization?
Non-living jelly-like substance in sponges
What stage is the jellyfish at in #4?
Masses of tissue containing many nerve cells
Early biologists though sponges were_________
What type of sponges are always sessile?
What kind of jellyfish has tentacles hanging downward?
Down
Animals that produce egg and sperm
Is circulation in a worm open or closed?
Outer layer of a jellyfish
Animals without a backbone
How many germ layers do cnidarians have?
Swollen band around the earthworm
Harpoon-like structure that a jellyfish has
Function is to circulate water through a sponge
A home for some fish
Inner layer of a jellyfish
Outer layer of a sponge
How many germ layers do sponges have?
Helps a worm dig through the soil
Pulls water through a sponge
Breaks off to become new jellyfish
Internal cross-walls that separate the inside of an earthworm
Part of the hydra that produces a sticky material
What type of symmetry does a sea anemone have?