One of a pair of air-filled cavities lined with mucous membrane and located inside the maxillary bone, lateral to the nasal cavity. These sinuses help resonate the voice, as well as to reduce the weight of the skull.
Full-Text Search Entries
sinus, sinuses (... of sinuses in other tissues include: carotid sinus. See pneumatization.)
paranasal sinuses (... dense head. These sinuses are expanded in Neandertals. See sinus.)
pneumatization (... the mastoid process, frontal sinus, and maxillary sinus.)
marginal venous sinus (One of two large bilateral venous sinuses found in the dura mater of the nuchal region inferior ...)