Most prominent and larger air cell of ethmoidal sinus?
Bulla Ethmoidalis: Most prominent and the largest anterior ethmoidal cell. It is located posterior to the frontal recess and enclosed laterally by the lamina papyracea. It forms the roof of the middle meatus. Agger Nasi: most anterior ethmoidal cell. Haller cell: infra orbital ethmoidal cell. Onodi cell: laterally placed posterior most ethmoidal cell.
Agger nasi cell
Haller cell
Onodi cell
Bulla ethmoidalis
FMGE 2019