Ostium

Look up ostium in Wiktionary, the free dictionary.

An ostium (pl.: ostia) in anatomy is a small opening or orifice.

Ostia, not as a plural, is also the name of a number of places.

Ostium or ostia may refer to:

Human anatomy

Ostium of fallopian tube
Ostium of the uterus (disambiguation)
Ostium primum of the developing heart
Ostium secundum (foramen ovale) of the developing heart
Ostium maxillare of the maxillary sinus
Ostium vaginae (vaginal orifice)
Coronary ostium – opening of coronary arteries at root of aorta, superior to aortic valve
Sinus ostium an opening that connects a sinus to the nasal cavity itself.

In other animals

Ostium (sponges), the pores of living sponges
Ostium (insect anatomy), of female Lepidoptera genitalia

See also

This set index article includes a list of related items that share the same name (or similar names).
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