Definition of musk. 1  1a : a substance with a penetrating persistent odor obtained from a sac beneath the abdominal skin of the male musk deer and used as a perfume fixative; also : a similar substance from another animal or a synthetic substituteb : the odor of musk; also : an odor resembling musk especially in heaviness or persistence.
Inferior Nasal Concha. The Inferior nasal concha is the most caudally based of the three nasal conchae. While the superior and middle nasal conchae form part of the perpendicular plate of the ethmoid bone, the inferior nasal concha is a bony structure by itself.It sits on the vertical bony plate known as the nasal septum, separating the nasal cavity into two bilateral and symmetrical anatomical caves.nferior Nasal Concha. The Inferior nasal concha is the most caudally based of the three nasal conchae. While the superior and middle nasal conchae form part of the perpendicular plate of the ethmoid bone, the inferior nasal concha is a bony structure by itself.
The roof of the nasal cavity is formed anteriorly by the nasal bones, the nasal spine of the frontal bone, and the floor of the frontal sinus. In its more horizontal midpart, the roof is formed by the cribriform plate of the ethmoid bone.part from the nasal vestibule which is lined by stratified squamous epithelium, nasal cavity is lined by pseudostratified columner ciliated epithelium i.e. respiratory epithelium. Each nasal fossa has four walls; roof, floor, septal wall, and lateral wall.