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Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

Online Dictionary of Invertebrate Zoology: Complete Work - Best Text

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386Maggenti and Gardnergastropores n. [Gr. gaster, stomach; poros, hole] (CNID: Hydrozoa)In Milleporina and Stylasterina, the larger pores inthe coenosteum through which gastrozooids protrude.Gastrotricha, gastrotrichs n.; n.pl. [Gr. gaster, stomach;thrix, hair] A phylum <strong>of</strong> aquatic micrometazoans that areoblong, strap-shaped to ovoid tenpin-shaped and bear locomotorcilia on the flattened venter.gastrovascular cavity A body cavity in which functions <strong>of</strong>both digestion and circulation occur.gastrovascular system The digestive-excretory system without-pouchings and canals.gastrozooid n. [Gr. gaster, stomach; zoon, animal] (CNID: Hydrozoa)In some colonial cnidarians, a hydroid modified forfeeding and digestion, also called siphons; in most species,they fulfill the defensive functions <strong>of</strong> the colony. see dactylozooid.gastrula n. [Gr. dim. gaster, stomach] Embryonic stage resemblinga sac with an outer layer <strong>of</strong> epiblastic cells (ectoderm)and an inner layer <strong>of</strong> hypoblastic cells (endodermand mesoderm); the enclosed cavity is the archenteron orgastrocoel. gastrular a.gathering hairs (ARTHRO: Insecta) The small hairs coveringthe glossa and the fringe <strong>of</strong> stouter bristles on the labellum<strong>of</strong> bees.Gause's rule see competitive exclusiongelatigenous a. [L. gelatus, congealed; genos, origin] Producinggelatin.gelatin, gelatine n. [L. gelatus, congealed] A jelly-like substance(gel) obtained from animal tissue; also loosely appliedto secretions <strong>of</strong> animals.gelatinous matrix An external glandular substance secretedby some invertebrates, into which the eggs are embeddedor deposited.geminate a. [L. geminus, two-fold] To double; occurring inpairs; twins.gemma n.; pl. -mae [L. gemma, bud] A bud or bud-like organicgrowth.

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