coelomic sac

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• excretion — excretion1 /ik skree sheuhn/, n. 1. the act of excreting. 2. the substance excreted, as urine or sweat, or certain plant products. [1595 1605; < LL excretion (s. of excretio) that which is sifted out. See EXCRETE, ION] excretion2 /ik skree… …   Universalium

• cardioblasts — n.pl [Gr. kardia, heart; blastos, bud] (ARTHROPODA: Insecta) Special cells during embryology that originate from the upper angle of the coelomic sac to form the heart and dorsal blood vessel …   Dictionary of invertebrate zoology

• hood — n. [A.S. hod] 1. A color marking or expansion suggesting a hood. 2. (ARTHROPODA: Chelicerata) In beetle mites, the dorsal wall of the camerostome that extends over the capitulum. 3. (ARTHROPODA: Insecta) a. In notodontoid and noctuoid Lepidoptera …   Dictionary of invertebrate zoology

• animal development — Introduction  the processes that lead eventually to the formation of a new animal starting from cells derived from one or more parent individuals. Development thus occurs following the process by which a new generation of organisms is produced by …   Universalium

• circulation — circulable /serr kyeuh leuh beuhl/, adj. /serr kyeuh lay sheuhn/, n. 1. an act or instance of circulating, moving in a circle or circuit, or flowing. 2. the continuous movement of blood through the heart and blood vessels, which is maintained… …   Universalium

• Endometriosis — Classification and external resources ICD 10 N80 I …   Wikipedia

• reproductive system, animal — Introduction       any of the organ systems by which animals reproduce.       The role of reproduction is to provide for the continued existence of a species; it is the process by which living organisms duplicate themselves. Animals compete with… …   Universalium

• respiration — 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,… …   Universalium

• hormone — hormonal, hormonic /hawr mon ik, moh nik/, adj. /hawr mohn/, n. 1. Biochem. any of various internally secreted compounds, as insulin or thyroxine, formed in endocrine glands, that affect the functions of specifically receptive organs or tissues… …   Universalium

• Bryozoa — Temporal range: Upper Cambrian–Recent[1] …   Wikipedia

• Halfbeak — label2= 2=Adrianichthyidae Phylogeny of the halfbeaks. The halfbeak family Hemiramphidae (Zenarchopterinae + Hemirhamphinae) is paraphyletic. [Nathan R. Lovejoy, Mahmood Iranpour, and Bruce B. Collette. 2004. Phylogeny and Jaw Ontogeny of… …   Wikipedia