Ostium
From Wikipedia, the free encyclopedia
An ostium is a small opening or orifice, as in a body organ or passage.
It can mean the following
- Any of the small openings or pores in a sponge for incoming water.
[edit] Anatomy
- Ostium of Fallopian tube.
- Ostium primum or foramen ovale (ostium secundum) of the developing heart.
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