Cnidarians Flashcards
Examples of Cnidarian animals
hydras, jellyfishes, sea anemones, corals, and their relatives
Ctenophora example
comb jellies
They comprise the branch radiata
Cnidaria and Ctenophra
animals with radial symmetry
radiata
animals with bilateral symmetry
bilateria
Two mahor branches of eumatazoans
Radiata and bilateria
what are animals with tissues
eumatozoans
radiate animals have ____ and ____ sides
oral and aboral sides
Radiate animals have no _____ and_____ and no _____ and _____
head end and rear; left and right
with ectoderm and endoderm layers only
diploblastic
has 3 germ layes including the mesoderm
triploblastic
radiata are _____ while bilateria are _____
diploblastic; triploblastic
acts as the mouth and anus
gastrovascular cavity
cnidarians are usually found in
shallow marine habitats in warm and tropical regions
four classes of cnidarians
Hydrozoa, Scyphozoa, Cubozoa, Anthozoa
the body wall of cnidarians have three basic layers:
ectodermis, gastrodermis or endodermis, and the lining of the gastrovascular cavity which is the coelenteron
other name for mouth in cnidarians
stomodaeum
cnidarians’ epidermis contains speciallized cells called
cnidocytes
cnidocytes (specialized cell) contain
nematocysts
two structural types of cnidarians
polyp(sessile) and medusa(free-swimming)
parts of the polyp
basal disc, body column, oral disc
medusa parts: basal discs becomes ____ and oral discs becomes ______
exumbrella and subumbrella
what is complete absent in athozoans
medusoid stage
two growth forms of polyps
solitary and colonial
