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32 Cards in this Set
- Front
- Back
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large cavity in sponge |
spongocoel |
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pores that bring water in sponge |
ostia |
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expels water from spongocoel |
osculum |
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choanocyte functions (3) |
create water current trap and phagocytize food reproduction - become sperm |
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mesohyl |
gelatinous, nonliving matrix that cells move around in |
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pinacocytes |
form outer layer of sponge |
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two capabilities of pinacocytes |
contractile phagocytize food |
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porocytes |
modified ostia - form porocytes |
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Archaeocytes locomotion |
ameoboid, move about freely in cell |
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archaeocyte function (4) |
digestion eliminate waste become gametes secrete skeleton |
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sclerocytes vs spongocytes |
sclerocytes - archaeocytes that produce spicules spongocytes - produce spongin |
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4 asexual reproduction methods |
fragmentation budding tissue regression/regeneration gemmules |
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fragmentation |
piece of sponge breaks off and develops into sponge |
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budding |
new sponge grows on parent and then detatches |
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tissue regression/regeneration |
lays dormant, creates compact mass and lose their function in bad conditions |
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gemule production |
archaeocytes eat other sponge cells, gets tough outer layer to create overwintering spore |
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monoecious or diecious? |
monoecious (hermaphrodidic) |
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internal or external fertilization? |
most internal |
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sponges brood embryos (process?) |
embryos develops within the sponge and larva is released |
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some are oviparous (process?) |
release fertilized eggs |
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larval type of sponge |
parenchymella |
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2 characteristics of sponge larva |
nonfeeding metamorphose within 24 hours |
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ascenoid condition |
flagellated spongocoel |
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synocoid condition |
flagellated radial canals |
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leuconoid |
flagellated chambers |
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which canal system is most common and most efficient? |
leuconoid |
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class calcera general characteristics (3) (calcareous sponges) |
CaCO3 spicules no spongin asconoid, synconoid and leuconoid |
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class demospongiae characteristics (3) (bath sponges) |
most sponge species spongin and/or siliceous spicules primarily leuconoid |
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class hexactinellida characteristics (4) glass sponges |
six-rayed siliceous/chitin spicules spongin absent syncytial covering synconoid, leuconoid |
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syncitial covering |
1 big multinucleated cell |
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what do Placozoa lack? (6) |
true tissue body cavity digestive system nervous system sensory structures muscles |
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3 placozoa characteristics |
motile extracellular digestion asexual reproduction |
