Middle ethmoidal sinus is supplied by: (A) Anterior ethmoidal nerve and vessels, (B) Middle ethmoidal nerve and vessels, (C) Posterior ethmoidal nerve and vessels, (D) All of the above
Answer is A. Middle ethmoidal sinus:
→ Made up of 1 to 7 air cells.
→ Opens into middle meatus of nose.
→ Supplied by -

Anterior ethmoidal nerve and vessels.
Orbital branches of pterygopalatine ganglion.

→ Lymphatic drainage - Submandibular nodes.