Pyriform (piriform) aperture
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- Skull openings (overview)
- Foramen magnum
- Supraorbital foramen (or notch)
- Frontal (supratrochlear) foramen (or notch)
- Infraorbital foramen
- Nasolacrimal canal
- Anterior ethmoidal foramen
- Posterior ethmoidal foramen
- Superior orbital fissure
- Optic canal
- Inferior orbital fissure
- Opening of frontal sinus
- Cribriform foramina
- Foramen rotundum
- Foramen ovale
- Foramen spinosum
- Foramen lacerum
- Jugular foramen
- Opening of sphenoidal sinus
- External and internal openings of the carotid canal
- Musculotubal canal
- Hiatus for greater petrosal nerve
- Hiatus for lesser petrosal nerve
- Internal acoustic (auditory) opening
- Opening of vestibular canaliculus
- Stylomastoid foramen
- Opening of cochlear aqueduct
- Mastoid canaliculus (Arnold's canal)
- Tympanic canaliculus (Jacobson's canaliculus)
- Mastoid foramen
- Pterygoid canal (Vidian canal)
- Condylar canal (condylar foramen)
- Hypoglossal canal
- Alveolar foramina
- Greater palatine foramen
- Lesser palatine foramina
- Maxillary hiatus
- Incisive foramen
- Pterygomaxillary fissure
- Sphenopalatine foramen
- External acoustic (auditory) opening
- Zygomaticoorbital foramen
- Zygomaticofacial foramen
- Zygomaticotemporal foramen
- Inferior alveolar foramen (mandibular foramen)
- Mental foramen
- Parietal foramen
- Choana
- Pyriform (piriform) aperture
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