atrial orifice
(ARTHROPODA: Insecta)
The exterior opening of the spiracular atrium.

Online Dictionary of Invertebrate Zoology. . 2005.

Look at other dictionaries:

  • Right atrioventricular orifice — Section of the heart showing the ventricular septum. (Right atrioventricular orifice visible at left, but not labeled.) Latin ostium atrioventriculare dextrum Gray s …   Wikipedia

  • Mitral stenosis — Classification and external resources Mitral stenosis with marked thickening of the leaflets and left atrial hypertrophy. Superior view. Autopsy preparation …   Wikipedia

  • 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

  • cardiovascular disease — Introduction       any of the diseases, whether congenital or acquired, of the heart and blood vessels (blood vessel). Among the most important are atherosclerosis, rheumatic heart disease, and vascular inflammation. Cardiovascular diseases are a …   Universalium

  • renal system — ▪ anatomy Introduction  in humans (human body), organ system that includes the kidneys, where urine is produced, and the ureters, bladder, and urethra for the passage, storage, and voiding of urine.       In many respects the human excretory, or… …   Universalium

  • human cardiovascular system — ▪ anatomy Introduction       organ system that conveys blood through vessels to and from all parts of the body, carrying nutrients and oxygen to tissues and removing carbon dioxide and other wastes. It is a closed tubular system in which the… …   Universalium

  • Aortic insufficiency — See also: mitral regurgitation and tricuspid insufficiency Aortic insufficiency Classification and external resources Micrograph of myxomatous degeneration – a cause of aortic insufficiency …   Wikipedia

  • Left atrioventricular opening — Latin ostium atrioventriculare sinistrum Gray s subject #139 533 The left atrioventricular opening (mitral orifice) is placed below and to the left of the aortic orifice. It is a little smaller than the corresponding aperture of the opposite side …   Wikipedia

  • 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

  • heart — A hollow muscular organ that receives the blood from the veins and propels it into the arteries. In mammals it is divided by a musculomembranous septum into two halves right or venous and left or arterial each of which consists of a receiving… …   Medical dictionary

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”