Unit 5 Part 1
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27 Terms
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Dioecious
has only one sex per individual; they either produce sperm or eggs
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Monoecious
(sponges) both sexes occur in the same individual
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Pinacocytes
the outside covering; cells that line the outser surface of the porifera
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Porocytes
where water enters the sponge; these cells regulate water circulation
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Mesohyl
jellylike layer of cells under pinacocytes
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Mesenchyme cells
(amoeboid cells) they function for reproduction, transportation, and storing food
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Choanocytes
cells that line the inner chamber and has flagellum (tail) to wave water around, creates water currents, and filters out food particles
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spicules
needle like spikes
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spongin
fibrous material made of collagen
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ascon
vase like body form of sponges
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sycon
body form where walls appear folded in
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leucon
body form with an extensively branched canal system
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gemmules (sponge)
resistant capsules containing amoeboid cells
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epidermis
outer layer of the body wall
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gastrodermis
inner layer of the body wall
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mesoglea
the jelly like material between the epidermis and the gastrodermis
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cnidocytes
stinging cells that are made of either epidermal of gastrodermal cells; they produce cnida
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cnida
fluid filled capsules containing hollowed tube that has toxins in it
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nematocysts
a type of cnida used in food gathering and defense that delivers paralyzing toxin
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polyp
the body form in which cnidarians are asexual, the mouth is surrounded by tentacles, and the aboral end is attached to the substrate
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medusa
the free swimming body stage, shaped like an inverted bowl, and typically the reproductive phase
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gastrovascular cavity
the fake body cavity that aids in digestion, exchanges gases, and discharges gametes and waste
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planula
a free swimming larvae that is formed from the blastula in the life cycle
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gastrozoid
polyps that are in charge of feeding
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gonozoid
polyps that are in charge of reproduction
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comb rows
rows of cillia that comb jellies use for movement
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colloblasts
cells that are used to capture prey