the.com/sinus
air-filled skull caves whose only known job is making your face hurt
means A hollow cavity within a bone or body part — most familiarly the air-filled spaces in the skull around the nose, but also any pouch or channel, like the sinuses of the heart or veins.
from From Latin 'sinus,' meaning a bend, fold, curve, or hollow — originally the fold of a toga draped across the chest, hence a 'bosom' or pocket. Anatomists borrowed it for the body's curving cavities and pouches. The same word, in its mathematical journey, gave us 'sine': Arabic translators rendered a Sanskrit term for 'bowstring' as 'jiba,' which got misread as 'jaib' (bosom, fold), which Latin scholars dutifully translated back as 'sinus' — so your aching head and your trig homework share an ancestor.
- mystery purpose
- Scientists still debate why they exist
- voice boost
- They resonate to enrich your speaking tone
- skull lightening
- Hollow spaces reduce head weight
- brain freeze
- Linked to nerve signals near sinus cavities
- newborn gap
- Babies are born with barely-formed sinuses
maxillary sinus — largest of the paranasal sinuses, located in the cheekbones above the teeth
sagittal sinus — major vein in the brain that drains blood from the cerebral cortex
carotid sinus — pressure-sensitive region in the carotid artery that regulates blood pressure