Question

identify this air - filled sinus.answers: a - d a sphenoid sinus b ethmoid sinus c maxillary sinus d frontal sinus

Explanation:

The ethmoid sinus is located between the eyes and the nasal cavity. In the provided image, the arrow points to the area corresponding to the ethmoid sinus. The sphenoid sinus is located deeper in the skull near the sphenoid bone. The maxillary sinus is located in the cheekbones. The frontal sinus is located in the forehead area.

Answer:

B. Ethmoid sinus