Passage, nasal

The walls of the nasal passages are coated with respiratory mucous membranes which contain innumerable tiny hair-like cells that act to move waves of mucus toward the throat. Dust, bacteria, and other particles inhaled from the air are trapped by the mucus in the nose, carried back, swallowed and dropped into the gastric juices to nullify any potential harm they might do. The organs of smell are made up of patches of tissue (the olfactory membranes) about the size of a postage stamp and located in a pair of clefts just under the bridge of the nose. Most air breathed in normally flows through the nose but only a small part reaches the olfactory clefts, enough to get a response to an odor. When a person sniffs to detect a smell, air moves faster through the nose, increasing the flow to the olfactory clefts and carrying more odor to these sensory organs.

Medical dictionary. 2011.

Look at other dictionaries:

  • Nasal hair — Nasal hair. Nasal hair or nose hair is the hair in the nose. Its main function is to keep foreign or unwanted particles from entering the lungs through the nasal cavity. Adult humans have hairs in the anterior nasal passage. Nasal hair should not …   Wikipedia

  • Nasal concha — Lateral wall of nasal cavity, showing ethmoid bone in position. (Superior and middle in pink, and inferior in blue.) …   Wikipedia

  • Nasal — may refer to: Nose, a protuberance in vertebrates that houses the nostrils, or nares, which admit and expel air for respiration in conjunction with the mouth Nasal bone, two small oblong bones placed side by side at the middle and upper part of… …   Wikipedia

  • Nasal irrigation — Intervention A woman flushing her nose with a neti pot. ICD 9 CM …   Wikipedia

  • nasal — nasal, ale, aux [ nazal, o ] adj. • 1363; du lat. nasus « nez » 1 ♦ Qui a rapport ou appartient au nez. Fosses nasales : les deux cavités séparées par la lame perpendiculaire du nez et par lesquelles l air pénètre par les narines. Cloison, épine… …   Encyclopédie Universelle

  • Nasal — Na sal (n[=a] zal), a. [F., from L. nasus the nose. See {Nose}.] 1. (Anat.) Of or pertaining to the nose. [1913 Webster] 2. (Phon.) Having a quality imparted by means of the nose; and specifically, made by lowering the soft palate, in some cases… …   The Collaborative International Dictionary of English

  • Nasal bones — Nasal Na sal (n[=a] zal), a. [F., from L. nasus the nose. See {Nose}.] 1. (Anat.) Of or pertaining to the nose. [1913 Webster] 2. (Phon.) Having a quality imparted by means of the nose; and specifically, made by lowering the soft palate, in some… …   The Collaborative International Dictionary of English

  • Nasal index — Nasal Na sal (n[=a] zal), a. [F., from L. nasus the nose. See {Nose}.] 1. (Anat.) Of or pertaining to the nose. [1913 Webster] 2. (Phon.) Having a quality imparted by means of the nose; and specifically, made by lowering the soft palate, in some… …   The Collaborative International Dictionary of English

  • Nasal congestion — Classification and external resources ICD 9 478.19 Nasal congestion is the blockage of the nasal passages usually due to membranes lining the nose becoming swollen from inflamed blood vessels.[1] …   Wikipedia

  • nasal — nasal, ale (na zal, za l ) adj. 1°   Terme d anatomie. Qui a rapport au nez. Le mucus nasal. •   Une autre [mouche], plus hardie encore, enfile les conduits nasaux du cerf, descend dans son palais, et dépose ses oeufs dans deux bourses charnues… …   Dictionnaire de la Langue Française d'Émile Littré

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.