Delicate Projections That Form from the Ethmoidal Labyrinth Are

Question

Delicate projections that form from the ethmoidal labyrinth are
A) olfactory foramina.
B) pterygoid processes.
C) sphenoidal sinuses.
D) superior and middle nasal conchae.
E) auditory ossicles.

Accepted Answer

The delicate projections that form from the ethmoidal labyrinth are the superior and middle nasal conchae, which help to increase the surface area of the nasal cavity and improve the sense of smell by forcing air to flow over the olfactory epithelium. The olfactory foramina are openings in the cribriform plate of the ethmoid bone that allow the passage of olfactory nerve fibers. The pterygoid processes are bony projections on the sphenoid bone that serve as attachment points for muscles of the jaw. The sphenoidal sinuses are air-filled spaces within the body of the sphenoid bone. The auditory ossicles are small bones in the middle ear that transmit sound vibrations from the eardrum to the inner ear.