True about sphenoid sinus: (PGI May 2010)
Ans: C (Open in sphenoethmoid recess) The paranasal air sinuses are lined with respiratory epithelium {ciliated pseudostratified columnar epithelium)"- www.american- rbinologic. orgypatientLnfo.sinusnasalanatomyphtrnlAnatomy of PNS EL Dhingra 5th/201Anterior group: This includes maxillary, frontal and anterior ethmoidal. They all open in the middle meatus/ and their ostia lie anterior to basal lamella of middle turbinate.Posterior groups: This includes posterior ethmoidal sinuses which open in the superior meatus, and the sphenoid sinus which open in sphenoethmoidal recess/.Table These occupy the body ofthe sphenoid boneTrue growth of the sin us occu rs at pubertyZ:
Lined by stratified squamous epithelium
Duct open in middle meatus
Open in sphenoethmoid recess
Present at birth
Nose and PNS