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Porifera and Cnidarians
Terms in this set (36)
silica or calcium carbonate
spicules may be made of ___ or ___ ____
network of thick collagen fibers
spicules and spongin
support structures in sponges
choanocytes line spongocoel
choanocytes line radial canals
choanocytes line the walls of small chambers
budding fragmentation or gemmules
sponges reproduce sexually by ____,___, or _____
seedlike particles containing amoebocytes that can survive freezing and drying (asexual reproduction for sponges)
sponges have male and female sex organs. therefore they are ______
amoebocytes are also called
porocytes are also called
choanocytes are also called
epithelial like cells
pinacocytes are also called
thin, flat cells that contract in response to touch or chemicals, control the size of ostia
line the interior of the sponge body, use flagella to draw water through pores
surround the ostia, aid in allowing water carrying nutrients into the sponge
aid in reproduction, transport nutrients, and help product spicles, they are founf in the mesoglea
found in the mesoglea, make up the sponges support system
main opening of sponges where water is expelled from the body of the sponge
the main body cavity of the sponge
jelly-like material found between the cell layers
how many cell layers make up a sponge?
they dont have a gastrula stage
what is unique about a sponge's development as compared with other animals?
(asexual reproduction in sponges) an external growth that may or may not break away; grows into a sponge when it settles
(asexual reproduction in sponges) fragments of a sponge break off and grow into new sponges
support system and defense system
what are the 2 functions of the spicules?
ameobocytes and spicules
what types of cells can be found in the mesoglea?
radial symmetry, one body opening, two cell layers, two body forms, stinging cells, nerve net
what are the 6 main characteristics of the phylum Cnidaria?
what does the word Cnidaria mean?
(body plan of cnidarian) free swimming with tentacles beneath its mouth and reproduce sexually
where are the tentacles of a medusa oriented?
where are the tentacles of a polyp oriented?
body plan of a cnidaria with a sessile body with tentacles oriented upward and reproduces asexually
what cell layer did the epidermis layer in cnidarians derive from?
what cell layer of cnidarians did the gastrodermis derive from?
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