system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Most prominent and larger air cell of ethmoidal sinus?
assistant
The correct answer is  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.