atrial cavity


atrial cavity
In procordates, a cavity located between the pharynx and the body wall.

Online Dictionary of Invertebrate Zoology. . 2005.

Look at other dictionaries:

  • atrial — adjective of or relating to a cavity or chamber in the body (especially one of the upper chambers of the heart) • Pertains to noun: ↑atrium • Derivationally related forms: ↑atrium • Topics: ↑anatomy, ↑general anatomy …   Useful english dictionary

  • Left atrial appendage — Infobox Anatomy Name = PAGENAME Latin = auricula sinistra GraySubject = 138 GrayPage = 533 Caption = Heart seen from above. (Left auricula labeled at bottom left.) Caption2 = Section of the heart showing the ventricular septum. (Left auricula… …   Wikipedia

  • tunicate — /tooh ni kit, kayt , tyooh /, n. 1. Zool. any sessile marine chordate of the subphylum Tunicata (Urochordata), having a saclike body enclosed in a thick membrane or tunic and two openings or siphons for the ingress and egress of water. adj. Also …   Universalium

  • syndrome — The aggregate of symptoms and signs associated with any morbid process, and constituting together the picture of the disease. SEE ALSO: disease. [G. s., a running together, tumultuous concourse; (in med.) a concurrence of symptoms, fr. syn,… …   Medical dictionary

  • Mitral regurgitation — See also: aortic insufficiency and tricuspid insufficiency Mitral regurgitation Classification and external resources Mitral regurgitation (schematic drawing) During systole, contraction of the left …   Wikipedia

  • Pericardial effusion — ICDO = OMIM = MedlinePlus = eMedicineSubj = med eMedicineTopic = 1786 MeshID = D010490 Pericardial effusion ( fluid around the heart ) is an abnormal accumulation of fluid in the pericardial cavity. Because of the limited amount of space in the… …   Wikipedia

  • Atria — Atrium A tri*um, n.; pl. {Atria}. [L., the fore court of a Roman house.] 1. (Arch.) (a) A square hall lighted from above, into which rooms open at one or more levels. (b) An open court with a porch or gallery around three or more sides;… …   The Collaborative International Dictionary of English

  • Atrium — A tri*um, n.; pl. {Atria}. [L., the fore court of a Roman house.] 1. (Arch.) (a) A square hall lighted from above, into which rooms open at one or more levels. (b) An open court with a porch or gallery around three or more sides; especially at… …   The Collaborative International Dictionary of English

  • amphioxus — /am fee ok seuhs/, n., pl. amphioxi / ok suy/, amphioxuses. Zool. lancelet. [1830 40; < NL: lit., sharp at both ends < Gk amphi AMPHI + oxýs pointed] * * * or lancelet Any of certain small marine chordates (invertebrate subphylum Cephalochordata) …   Universalium

  • prosiphonate lining — (PORIFERA: Calcarea) In recent Sphinctozoa, the lining of the atrial cavity of one chamber growing forward into the base of the next youngest chamber …   Dictionary of invertebrate zoology


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