Thin, flat cells covering the outer surface of sponges
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Porocytes
Pinacocyte cells in sponge body walls that regulate water
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Mesohyl
A jelly-like layer of sponge below pinanocytes
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Mesenchyme cells
Amoeboid cells within the mesohyl of a sponge; specialized for reproduction, secreting skeletal elements, transporting and storing food, and forming contractile rings.
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Choanocytes
Colllar cells that create water currents and filter food
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Spicules
sharp spikes forming the "skeleton"
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Spongin
A fibrous collagenous material making up the skeletal network
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Ascon
Vase-like sponge
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Sycon
sponge where body walls appear folded
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Leucon
Extensive branched canal system
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Ostia
Outer openings on the body wall of sponges
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Spongocoel
The large central cavity of sponges
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Incurrent canals
Canal through which water enters a sponge
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Archaeocytes
Ameboid cells that capture and digest food
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Sclerocytes
Secrete mineralized, calcareous spicules
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Collagen
Structural protein found in sponge skeletons
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Monoecious
Has male and female reproductive organs
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Dioecious
Has only male or female reproductive organs
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Budding
Form of reproduction where the organism develops outgrowth or bud
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