excurrent
51synconoid grade — (PORIFERA) A grade of construction intermediate between the asconoid and the leuconoid, in which each radial canal is subdivided into elongate flagellate chambers grouped around a common excurrent channel; see leuconoid grade, asconoid grade …
52apopyle — /ap euh puyl /, n. Zool. (in sponges) a pore in each of the saclike chambers formed by the evagination of the body wall, through which water passes into the excurrent canals. Cf. prosopyle. [1885 90; APO + Gk pýle gate, entrance; see PYLON] * * * …
53respiration — respirational, adj. /res peuh ray sheuhn/, n. 1. the act of respiring; inhalation and exhalation of air; breathing. 2. Biol. a. the sum total of the physical and chemical processes in an organism by which oxygen is conveyed to tissues and cells,… …
54spiracle — spiracular /spuy rak yeuh leuhr, spi /, adj. /spuy reuh keuhl, spir euh /, n. 1. a breathing hole; an opening by which a confined space has communication with the outer air; air hole. 2. Zool. a. an aperture or orifice through which air or water… …
55tree — treelike, adj. /tree/, n., v., treed, treeing. n. 1. a plant having a permanently woody main stem or trunk, ordinarily growing to a considerable height, and usually developing branches at some distance from the ground. 2. any of various shrubs,… …
56Tree — /tree/, n. Sir Herbert Beerbohm /bear bohm/, (Herbert Beerbohm), 1853 1917, English actor and theater manager; brother of Max Beerbohm. * * * I Woody perennial plant. Most trees have a single self supporting trunk containing woody tissues, and in …
57digestive system, invertebrate — ▪ anatomy Introduction any of the systems used by invertebrates for the process of digestion. Included are vacuolar and channel network systems, as well as more specialized saccular and tubular systems. Comparison of unicellular and… …
58incurrent — adjective Carrying inward; relating to an inward current. Ant: excurrent …
59Mopalia ciliata — Scientific classification Kingdom: Animalia Division: Mollusca Class: Polyplacophora …
60Northern river shark — Conservation status Critically Endangered (IUCN 3.1)[1] …
