The sinuses are, with the nasal passages, a filter of the inhaled substances.
The olfactory information is captured by the olfactory bulbs connected to the hypothalamus. The nostrils are oriented downwards, they allow to smell the smell of the earth, of reality. Sinuses are related to air communication.
The sinuses and the hypothalamus are the regulators of the olfaction.
A healthy sinus system is a reflection of a good respiratory balance in its feminine or masculine expression.
The sinuses are part of the family Pumons-Colon in relation to the sense of smell