Lanugo sahifasining manbasini koʻrish

{{Tibbiy holat bilgiqutisi
| nomi                   = Lanugo
| tasvir                 = Lanugo.png
| izoh                   = <ref name=TheFreeDictionary>{{cite web|first=Dorland's Medical Dictionary for Health Consumers|last=Saunders, an imprint of Elsevier, Inc.|title=Lanugo : definition|url=http://medical-dictionary.thefreedictionary.com/lanugo|publisher=TheFreeDictionary|access-date=17 February 2013}}</ref><ref>[http://dictionary.reference.com/browse/lanugo „lanugo“]. ''[[Random House Webster's Unabridged Dictionary]]''</ref>.
| soha = [[Pediatriya]]
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'''Lanugo''' – juda nozik, mayin, odatda pigmentsiz tuk boʻlib, baʼzan homila yoki chaqaloq tanasida uchraydi. Lanugo homila soch follikulalari hosil qilgan ilk tuk hisoblanadi va odatda [[homiladorlik]]ning 16-haftasida paydo boʻlib, 20-haftagacha koʻpayib boradi. Lanugo koʻpincha tugʻilishdan oldin, homiladorlikning 7 yoki 8-oylarida toʻkiladi, ammo baʼzida chaqaloq tugʻilganda ham saqlanib qolishi mumkin. Bunday holda, u bir necha hafta ichida oʻz-oʻzidan yoʻqoladi<ref name=MedicineNet>{{cite web|title=Definition of Lanugo|url=http://www.medterms.com/script/main/art.asp?articlekey=6210|publisher=MedicineNet: medterms medical dictionary|access-date=17 February 2013}}</ref>.

Lanugoning oʻrnini xuddi shu yuzalarni qoplaydigan, vellus tuk deb ataladigan mayda tuklar egallaydi. Bu tuklar nozikroq va koʻz ilgʻashi qiyinroq boʻladi. Voyaga yetguncha saqlanib qoladigan, koʻproq koʻzga tashlanadigan tuklar terminal tuklar deyiladi. Ular maʼlum joylarda paydo boʻladi va gormonlarga bogʻliq hisoblanadi<ref>{{cite web|last1=Ascher-Walsh|first1=Charles J|title=What is lanugo?|url=http://www.pregnancyandbaby.com/baby/articles/942829/what-is-lanugo|website=Pregnancy&Baby|publisher=SheKnows|access-date=7 February 2013|arxivsana=2019-02-14|arxivurl=https://web.archive.org/web/20190214174314/http://pregnancyandbaby.com/baby/articles/942829/what-is-lanugo}}</ref>. Bu atama [[Lotin tili|lotincha]] „jun“ maʼnosini anglatuvchi „lana“ soʻzidan kelib chiqqan.
== Odamlar ==
=== Homilaning rivojlanishi ===
Inson rivojlanishi davomida lanugo homilalarda homiladorlikning normal jarayoni sifatida oʻsadi, lekin u odatda homiladorlikning oʻttiz uch-oʻttiz oltinchi haftalarida tushib, yengil tuklar bilan almashadi. Lanugo teridan toʻkilayotganda, rivojlanayotgan homila tomonidan sochlarning yutilishi tabiiy holat hisoblanadi, chunki u amniotik suyuqlikni ichadi va oʻz muhitiga siydik chiqaradi. Natijada, lanugo yangi tugʻilgan chaqaloqning mekoniysi tarkibiga oʻz hissasini qoʻshadi. Yangi tugʻilgan chaqaloqlarda lanugoning mavjudligi muddatidan oldin tugʻilganlik belgisi boʻlishi shart emas, chunki u homiladorlikning oʻttiz toʻqqizinchi haftasida (toʻliq muddatda) tugʻilgan chaqaloqlarda ham kuzatilishi mumkin.

Lanugo teri yuzasidagi verniks kazeozani mahkamlab turish uchun langar vazifasini bajaradi. Ular birgalikda homilaning nozik terisini amniotik suyuqlikdan himoya qiladi<ref>{{cite book|last=Moore|first=Keith L|title=The Developing Human: Clinically Oriented Embryology|date=Dec 19, 2011|publisher=Elsevier|isbn=978-1437720020|page=98|url=https://www.inkling.com/read/the-developing-human-moore-9th/chapter-19/development-of-skin-and}}</ref>. Bundan tashqari, verniks kazeoza homilani bachadondan tashqaridagi hayotga tayyorlashga yordam beradi. U tugʻilish jarayonini osonlashtiradi, tana haroratini boshqarishga, suv yoʻqotilishining oldini olishga va tugʻma immunitetni mustahkamlashga xizmat qiladi. Agar lanugo verniks kazeozani mahkamlab turmasa, bu funksiyalar toʻliq amalga oshirilmagan boʻlardi<ref>{{cite journal|last=Singh|first=G|author2=Archana |title=Unraveling the mystery of vernix caseosa|journal=Indian Journal of Dermatology|year=2008|volume=53|issue=2|pages=54–60|doi=10.4103/0019-5154.41645|pmid=19881987|pmc=2763724|doi-access=free}}</ref>.
=== Notoʻgʻri ovqatlanish ===
Yogʻ yoʻqligida lanugo izolyator vazifasini bajarib oʻsadi va shu sababli toʻyib ovqatlanmaydigan bemorlarda, jumladan ovqatlanish buzilishi boʻlgan kishilarda kuzatilishi mumkin. Boshqa jismoniy belgilar bilan birga aniqlanganda, lanugo shifokorga [[anoreksiya]] nervoza yoki [[Bulimiya nevrozi|bulimiya nervoza]] tashxisini qoʻyishda yordam beradi<ref>{{cite journal |last1=Williams |first1=Pamela M. |last2=Goodie |first2=Jeffrey |last3=Motsinger |first3=Charles D. |title=Treating Eating Disorders in Primary Care |journal=American Family Physician |date=15 January 2008 |volume=77 |issue=2 |pages=187–195 |pmid=18246888 |url=http://www.aafp.org/afp/2008/0115/p187.html}}</ref>.
=== Teratoma ===
Koʻpincha teratomalar (tugʻma oʻsmalar) da uchraydi.
== Boshqa sutemizuvchilar ==
Lanugo boshqa sutemizuvchilarda ham keng tarqalgan. Masalan, tyulenlar va fillar koʻpincha lanugo qoplamasi bilan tugʻiladi<ref name="Monachus Science Posters">{{cite journal|last=Androukaki|first=E.|author2=Fatsea, E., 't Hart, L., Osterhaus, A.D.M.E., Tounta, E. and Kotomatas, S.|title=Growth and Development of Mediterranean Monk Seal Pups during Rehabilitation|journal=Monachus Science Posters|date=May 2002|volume=5|issue=1|pages=This poster was presented at the 16th ECS (European Cetacean Society) Conference, "Marine Mammal Health: from Individuals to Populations", 7–11 April 2002, Liege, Belgium|url=http://www.monachus-guardian.org/mguard09/09scien3.htm|access-date=13 April 2013}}</ref> <ref>{{cite journal | url=https://www.jstor.org/stable/2559288 | jstor=2559288 | title=Ecology of the Asian Elephant in Lowland Dry Zone Habitats of the Mahaweli River Basin, Sri Lanka | last1=Ishwaran | first1=Natarajan | journal=Journal of Tropical Ecology | date=1993 | volume=9 | issue=2 | pages=169–182 | doi=10.1017/S0266467400007148 | s2cid=84830688 | url-access=subscription }}</ref><ref>[http://elephant.elehost.com/About_Elephants/Anatomy/The_Hair/the_hair.html ''The Hair''] {{Webarxiv|url=https://web.archive.org/web/20170614021631/http://elephant.elehost.com/About_Elephants/Anatomy/The_Hair/the_hair.html |date=2017-06-14 }}, Paul MacKenzie, [http://elephant.elehost.com/index.html Elephant Information Repository website] {{Webarxiv|url=https://web.archive.org/web/20170430102142/http://elephant.elehost.com/index.html |date=2017-04-30 }}</ref><ref>[http://www.animalcorner.co.uk/wildlife/elephants/elephant_anatomy.html ''Elephant Hair''], Elephant Anatomy, [http://www.animalcorner.co.uk/index.html Animal Corner website] {{webarchive|url=https://web.archive.org/web/20071117200853/http://www.animalcorner.co.uk/index.html |date=2007-11-17 }}</ref>. Homilador kitlar va delfinlarning ayrim turlarida ham lanugo mavjud<ref>{{cite book|last1=Coyne|first1=Jerry A.|title=Why Evolution is True|date=14 January 2010|publisher=OUP Oxford|isbn=9780191643842|page=89|url=https://books.google.com/books?id=J91Z6ED7MgEC&pg=PT89|language=en}}</ref><ref>{{cite web|title=11 Cool Facts About Whales, Dolphins, and Porpoises|date=16 February 2021|website=NOAA Fisheries|url=https://www.fisheries.noaa.gov/feature-story/11-cool-facts-about-whales-dolphins-and-porpoises}}</ref>.
== Manbalar ==
{{manbalar}}
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[[Turkum:Biologiya]]