ostium
mouthlike opening
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby ...
ostium Opening.
otoacariasis Infestation of the external ear canal by ticks or mites.
otolith Calcareous concretions in the membranous labyrinth of the inner ear of lower vertebrates, or in the auditory organ of certain invertebrates.
For a time the atria communicate with each other by an opening, the ostium primum of Born, below the free margin of the septum.
Primitive heart tube: Truncus arteriosus - Bulbus cordis - Primitive ventricle - Primitive atrium - Sinus venosus
Septum primum (Ostium primum, Ostium secundum) - Septum secundum (Foramen ovale) - other septa (Endocardial cushions/Septum intermedium, ...
Mallei, collum mallei. Tapiroid c., a uterine cervix with a peculiarly elongated anterior lip. C. Uteri, neck of uterus: the lower and narrow end of the uterus, between the isthmus and the ostium uteri.
 See also: Posterior, Human, Vessels, Class, Trans
  
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