The gender is determined by the article, either definite (the in English) or indefinite (a/an in English). 1  Masculine definite article: le [leu]. 2  Feminine definite article: la.3  Masculine indefinite article: un [nasal sound which can be derived from the English sound un as explained in the first lesson].he gender is determined by the article, either definite (the in English) or indefinite (a/an in English). 1  Masculine definite article: le [leu]. 2  Feminine definite article: la.
Frontal sinus. The frontal sinuses are pockets of space located above the orbit of each eye in the frontal bone. They are lined with mucus membrane, which secretes fluid that moistens and protects the areas it covers. The size and shape of the frontal sinus can vary from person to person.These spaces fill up with mucus, which then drain into the nose. The draining process can be hindered by blockages. If mucus accumulates, this can cause infections.hey are lined with mucus membrane, which secretes fluid that moistens and protects the areas it covers. The size and shape of the frontal sinus can vary from person to person. These spaces fill up with mucus, which then drain into the nose.
The sinuses develop as outgrowths of, and drain into, the nasal cavity. The mucosa of the sinuses connects to the nasal mucosa. Nasolacrimal ducts. Nasolacrimal ducts are the ducts which connect the lacrimal (tear) ducts in the eye to the nasal cavity.he nasal cavity functions to allow air to enter the respiratory system upon respiration. Structures within the cavity regulate the flow of air and particles it contains. The olfactory region of the nasal cavity regulates the sense of smell.