In humans, the nasal cycle is the normal ultradian cycle of each nostril's blood vessels becoming engorged in swelling, then shrinking. The nostrils are separated by the septum. The septum can …

The nostrils (anterior nares) serve as the primary external openings of the nose, playing a critical role in respiration, filtration, olfaction, and airflow regulation.

Mar 5, 2024 · Below the apex are the two openings called the nostrils and they serve as entrances to the nasal cavity. These nostrils are separated by the nasal septum. Laterally, they are bordered by the …

Outer structure. The outer part of your nose consists of the nasal bone, cartilage, and fat. Together, they define the shape of your nose and house the nostrils.

Dec 4, 2016 · The meaning of NOSTRIL is either of the external nares; broadly : either of the nares with the adjoining passage on the same side of the septum. How to use nostril in a sentence.

Jul 29, 2024 · Nostrils (nares): Your nostrils are holes that lead to your nasal cavities.

Under the cool skin not a muscle had stirred; the breath came quietly, evenly, and it came through the nostrils.

The reason for paired nostrils, however, is a little less obvious. While there is no such thing as stereo olfaction (smelling), the pairing of our nostrils is not just for show.

Definition of nostril noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Nov 6, 2025 · The exterior nares, or nostrils, lead into the nasal vestibule, which is supported by the cartilage of the nose and is lined with tissue that contains short, coarse hairs. 3