The term sinus,as it relates to bone markings,may be defined as a:
A) raised area or projection.
B) cavity within a bone.
C) tubelike opening or channel.
D) groove or elongated depression.

Question

Quizplus · Accepted Answer

The term sinus, as it relates to bone markings, refers to a cavity within a bone. Examples include the maxillary sinus in the skull and the frontal sinus in the forehead bone.

The Term Sinus,as It Relates to Bone Markings,may Be Defined