preoral cavity
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buccal cavity — the cavity of the mouth, which contains the tongue and teeth and leads to the pharynx. Here food is tasted, chewed, and mixed with saliva, which begins the process of digestion. * * * 1. that portion of the oral cavity bounded on one side by the… … Medical dictionary
atrium oris — Preoral cavity, bounded ventrally by posteriorly directed labrum, dorsally by ventral surface of cephalon just behind mouth, and laterally by paragnaths and mandibles [Moore and McCormick, 1969]. Preoral cavity, bounded ventrally by posteriorly… … Crustacea glossary
scorpion — scorpionic /skawr pee on ik/, adj. /skawr pee euhn/, n. 1. any of numerous arachnids of the order Scorpionida, widely distributed in warmer parts of the world, having a long, narrow, segmented tail that terminates in a venomous sting. 2. the… … Universalium
Insect morphology — Legend of body parts Tagmata : A Head, B Thorax, C Abdomen. 1. antenna 2. ocelli (lower) 3. ocelli (upper) 4. compound eye 5. brain (cerebral ganglia) 6. prothorax … Wikipedia
Chelicerata — Temporal range: 445–0 Ma … Wikipedia
mouth — (Order Cladocera): Anterior opening of digestive tract under labrum; opens into esophagus [Stachowitsch, 1992]. (Order Notostraca): Anterior opening of digestive tract on underside of head; located under labrum and opening into esophagus… … Crustacea glossary
labrum — A bulbous structure lying next to the epistome and bordering the anterior margin of the oral opening. (Syn. upper lip) [Holdich and Jones, 1983]. An unpaired, flat segment of the cephalon that articulates with the clypeus, and anteriorly covers… … Crustacea glossary
atrium — n.; pl. atria [L. atrium, vestibule] 1. A cavity, division, entrance or passageway of various invertebrates. 2. (ANNELIDA) a. A diverticulum of the spermatheca; a tubular or capsular prostate. b. Male reproductive organ in leeches, consisting of… … Dictionary of invertebrate zoology
Spider — Taxobox name = Spiders image width = 250px image caption = an Orb weaver spider, Family: Araneidae regnum = Animalia phylum = Arthropoda subphylum = Chelicerata classis = Arachnida ordo = Araneae ordo authority = Clerck, 1757 diversity link =… … Wikipedia
mandible — Most anterodorsally situated of gnathal appendages; one, of a pair, of heavily calcified jaws; the teeth. [Hobbs and Jass, 1988]. On of the heavily calcified jaws lying anterior to (beneath, in ventral view) the other mouth parts but visible in… … Crustacea glossary
