Ostium

Look up ostium in Wiktionary, the free dictionary.

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

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
  • Ostia of female lepidoptera genitalia

See also

  • All pages with titles containing Ostium
  • Pore (disambiguation)
  • Foramen
  • Ostiole
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