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.
Structure [edit]. Frontal sinuses are rarely symmetrical and the septum between them frequently deviates to one or other side of the middle line. Their average measurements are as follows: height 28 mm, breadth 24 mm, depth 20 mm, creating a space of 6-7 ml.nfection of the frontal sinus causing sinusitis can give rise to serious complications, as it is in close proximity to the orbit and cranial cavity (orbital cellulitis, epidural and subdural abscess, meningitis).