Hajuepiteeli

Hajuepiteeli on limakalvoon kuuluva osa, jossa ovat hajuaistin reseptorit,[1] eli se on hajuaistimuksen kannalta olennainen osa. Hajuepiteeli sijaitsee nenäontelon yläosassa[1] ja on noin viiden neliösentin kokoinen. Hajuepiteeliä voivat vahingoittaa myrkylliset kaasut, isku päähän tai nenän sisäosaan syntyvä vaurio ja eräät lääkkeet ja nenäsuihkeet.[2]

Koiran hajuepiteeli on ihmisen hajuepiteeliin verrattuna valtavan suuri, mutta sen hajuaistin tehokkuuden selittää osin myös se, että sen aivoissa on hajujen käsittelyyn paljon suurempi alue kuin ihmisellä[3]

Lähteet

  1. ↑ a b Turunen, Seppo: Biologia: Ihminen, s. 177. (5.–7. painos) WSOY, 2007. ISBN 978-951-0-29701-8
  2. ↑ Tuoksujen ihmeellinen maailma (Arkistoitu – Internet Archive)
  3. ↑ Pelastuskoirien jäljestäminen (Arkistoitu – Internet Archive)

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