preoral gut
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gut — 1. SYN: intestine. 2. Embryonic digestive tube. 3. Abbreviated term for catgut. SEE ALSO: suture. [A.S.] blind g. SYN: cecum (1). postanal g. an extension … Medical dictionary
pocket — 1. A cul de sac or pouchlike cavity. 2. A diseased gingival attachment; a space between the inflamed gum and the surface of a tooth, limited apically by an epithelial attachment. 3. To enclose within a confined space, as the … Medical dictionary
Arthropod head problem — The arthropod head problem is a long standing zoological dispute concerning the segmental composition of the heads of the various arthropod groups, and how they are evolutionarily related to each other. While the dispute has historically centered … Wikipedia
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
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
annelid — /an l id/, n. 1. any segmented worm of the phylum Annelida, including the earthworms, leeches, and various marine forms. adj. 2. belonging or pertaining to the Annelida. Also, annelidan /euh nel i dn/. [1825 35; see ANNELIDA] * * * Any member of… … Universalium
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
protozoan — /proh teuh zoh euhn/, n., pl. protozoans, (esp. collectively) protozoa / zoh euh/, adj. Biol. n. 1. any of a diverse group of eukaryotes, of the kingdom Protista, that are primarily unicellular, existing singly or aggregating into colonies, are… … Universalium
Echinoderm — Temporal range: Cambrian–recent … Wikipedia
