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35 Cards in this Set
- Front
- Back
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spicule
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one of the minute calcareous or siliceous skeletal bodies found in sponges, radiolarians, soft corals, and sea cucumbers
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spongin
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Fibrous, callagenous material making up the skleletal network of sponges
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ostia
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tiny openings for incoming water
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osculum
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excurrent opening in a sponge
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choanocytes
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One of the flagellate collar cells that line cavities and canals of sponges
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spongocoel
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central cavity in sponges
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radial canals
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canals along the ambulacra radiating from the ring canal of echinoderms
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incurrent canal
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canal that water enters sponge through
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prosopyle
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connections between the incurrent and radial canals in some sponges
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mesohyl
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gelatinous matrixes in which sponges are arranged in
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pinacocyte
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thin, flat epithelial-type cells that cover the exterior surface and some interior surfaces
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pinacoderm
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a bunch ephithelial cells combined
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myocytes
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Contractile cell in sponges
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sclerocytres
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secretes spicules in sponges
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spongocytes
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secrete spongin fibers of the skeleton
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collencytes
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secrete fibrillar collagen
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Lophocytes
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secrete large quantities of collagen but are distinguishable moprhologically from collencytes
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intracellular
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occurs on outside of cell
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Asexual Reproduction
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occurs by means of bud formation and by regeneration following fragmentation
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External buds
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may detached from parent and form new sponges or remain on sponge to form colonies
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Internal buds
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formed in fresh water or marine sponges. type od asexual reproduction
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micropyle
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special opening on the sponge
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sexual reproduction
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sex that results from sperm to egg
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monoecious
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have both male female sex cells in one individual
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parenchymula
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flagellated, solid-bodied larva of some sponges
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amphiblastula
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free-swimming larval stage of certain marine sponges
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Inversion
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when blastula turns inside out
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micromeres
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flagellated cells
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macromeres
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nonflagellated cells
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regeneration
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ability to repair injuries and to restore lost parts
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somatic embryogenesis
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type of regeneration
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trabecular net
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network of living tissue formed by pseudopia of amebocytes
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Class Calcarea
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Have spicules of calcium carbonate that often form a fringe around the osculum (main water outlet).
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Class Hexactinellida
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Have six-rayed siliceous spicules extending ar right angles from a central point" spicules often united to form a network
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Class Demospongiac
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Have siliceous spicules that are not six rayed , or spongic, or both
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