Anatom3DSphenoid sinus
Sinus sphenoidalis · Klínová dutina
Respiratory system
Looks like
An air space deep in the centre of the skull behind the nose, next to the pituitary and optic nerves.
What it does
Lightens the skull base; surgeons reach the pituitary through it.
Keeping it well
Infection here is uncommon but dangerous; headache with fever and eye symptoms needs urgent care.