The Nose The nose, a prominent feature of the face, is the only external portion of the respiratory system. Air enters the nose through external openings called nostrils. The nose contains two nasal cavities, which are narrow canals separated from one another by a septum composed of bone and cartilage (Fig. 14.2). Mucous membrane lines the nasal cavities.
Rain God Mask, 13th–14th century. Mexico, Mesoamerica. The Metropolitan Museum of Art, New York. The Michael C. Rockefeller Memorial Collection, Bequest of Nelson A. Rockefeller, 1979 (1979.206.1062) | This mask, carved from a light green serpentine, depicts the rain god Tlaloc with the characteristic ringed eyes, prominent teeth, and a mouth with an upper lip-moustache that curls on each side. He also wears a nose bar in the nasal septum. #mustache #movember