home
RSS
Why our noses are different shapes
Left: The nasal bone structure of a person of African origin. Right: Nose of a person of European origin.
March 20th, 2013
12:06 PM ET

Why our noses are different shapes

There are pouches on each side of the human nose below the eyes that are called maxillary sinuses. They're involved in sinus infections, so you may already have a bias against them.

But Nathan Holton, a postdoctoral research fellow in the department of orthodontics at the University of Iowa, wanted to find out why there's such variation in these structures, and how they are affected by variation in the nasal cavity. A study on the subject is published in the journal The Anatomical Record.

Holton and colleagues took computed tomography scans of 40 people. About half of them were European-Americans, and the other half were African-Americans or native South Africans.

They found that the bigger the volume of the nasal cavity, the bigger the maxillary sinuses, in both populations. This is also associated with the overall face size, the researchers said, and suggests that the maxillary sinuses play a role in allowing the nose shape to vary. It appears that the sinuses make room for the nose.

But when the face size is about the same, maxillary sinuses tended to be 36% larger in people of European ancestry than of African ancestry because Europeans tend to have narrower nose shapes.

The various shapes of noses appear to be tied to adaptations to climate, Holton said. The nose must properly heat and humidify the air that you breathe. In a cold climate, it's advantageous to have a narrower nose. That's so that when a person inhales, more air comes into contact with the mucosal surface of nose, which provides moisture. The narrow nose maximizes the surface area.

"The fact that we have sinuses seems to allow for this accommodation of variation in nasal shape, which seems to be important, in evolutionary terms, with regard to climatic adaptation," Holton said.

The maxillary sinuses probably do not serve an important purpose in terms of nasal respiratory function, he said.


soundoff (1,756 Responses)
  1. rv sales orange county

    https://www.track.affsrc.com/track/clicks/3171/c627c2b89e0522dbfe9cbd2e8d2b8914736245cb75e9f0ab416db1046005?t=https://ocrvcenter.com/rv-repair-shop-mission-hills-california/

    May 22, 2021 at 07:39 | Report abuse | Reply
  2. SEO Marketing Company

    https://loadstarcorp.net/__media__/js/netsoltrademark.php?d=https://affordableranking.com

    May 22, 2021 at 07:55 | Report abuse | Reply
  3. rv upgrades

    This is a great tip especially to those fresh to the blogosphere. Simple but very precise info… Many thanks for sharing this one. A must read post!

    https://www.vanpeople.com/space/link.php?url=https://www.ocrvcenter.com/box-truck-collision-repair-shop-near-me

    May 22, 2021 at 09:06 | Report abuse | Reply
  4. motorhome interior renovation

    http://www.hellotw.com/gate/big5/ocrvcenter.com/cascade-collision-repair-shop-near-me

    May 22, 2021 at 10:49 | Report abuse | Reply
  5. RV Flooring California

    I blog often and I really thank you for your content. Your article has truly peaked my interest. I am going to take a note of your website and keep checking for new information about once per week. I subscribed to your RSS feed as well.

    http://sogo.i2i.jp/link_go.php?url=http://ocrv.org/rv-repair-shop-pico-rivera-california

    May 22, 2021 at 16:49 | Report abuse | Reply
  6. rv upgrades

    You made some good points there. I checked on the internet to learn more about the issue and found most people will go along with your views on this website.

    http://www.kzsoft.to/rank.cgi?mode=link&id=1187&url=http://www.ocrvcenter.com/rv-repair-shop-el-monte-california

    May 22, 2021 at 18:29 | Report abuse | Reply
  7. box truck repair

    https://intranet.fundaciones.org/AEF_ADMIN/GEA-SEND/click.php?id=em541024401f48c&idparent=cw54102032a42d4&customer=cw4b7d69c7427ca&email=nievescuenca@leucemiaylinfoma.com&status=2&url=https://ocrvcenter.com/rv-repair-shop-san-dimas-california

    May 22, 2021 at 18:40 | Report abuse | Reply
  8. cyclomune

    buy cyclosporine online buy cyclomune usa

    May 22, 2021 at 18:58 | Report abuse | Reply
  9. FmrfEncox

    cialis daily http://cialisee.com/ real cialis sublingual

    May 22, 2021 at 19:28 | Report abuse | Reply
  10. tv repair in temecula

    http://www.sns.lilyenglish.com/link.php?url=http://www.ocrvcenter.com/rv-repair-shop-palos-verdes-estates-california/

    May 22, 2021 at 19:57 | Report abuse | Reply
  11. rv countertop remodel

    http://ycaistock.com/home/link.php?url=https://ocrvcenter.com/haul-truck-collision-repair-shop-near-me/

    May 22, 2021 at 21:33 | Report abuse | Reply
  12. horse hauler motorhome

    http://www.danubiushotels.com/inc/u/?https://ocrvcenter.com/manufacturing-truck-collision-repair-shop-near-me&_ltra=dab4d1d3b7718c2c9e91a686f3ff7361.ltra.1613.12

    May 23, 2021 at 03:53 | Report abuse | Reply
  13. Scott Ferrett

    Have you ever heard of second life (sl for short). It is basically a video game where you can do anything you want. SL is literally my second life (pun intended lol). If you would like to see more you can see these sl authors and blogs

    http://everydayliteracies.blogspot.com/2018/01/new-book-in-our-series-congrats-again.html?showComment=1541994288818

    May 23, 2021 at 04:00 | Report abuse | Reply
  14. rv parts and service near me

    http://dresscircle-net.com/suteki/rank.cgi?mode=link&id=633&url=https://www.ocrvcenter.com/rv-repair-shop-stanton-california/

    May 23, 2021 at 04:43 | Report abuse | Reply
  15. RV Roof Los Angeles

    Oh my goodness! Incredible article dude! Many thanks, However I am encountering problems with your RSS. I don’t understand the reason why I can't subscribe to it. Is there anybody getting the same RSS issues? Anyone that knows the solution will you kindly respond? Thanks!!

    https://www.usdf.org/e-trak/asp/forward.asp?id=354&FPath=https://orcca.org/Business/Customer_Service/rv-repair-nearby-56308

    May 23, 2021 at 04:58 | Report abuse | Reply
  16. store xnxx

    Hi there! I could have sworn I’ve been to this site before but after going through many of the articles I realized it’s new to me. Anyhow, I’m certainly happy I found it and I’ll be book-marking it and checking back regularly!

    http://space.sosot.net/link.php?url=https://ocrvcenter.com/fleet-truck-collision-repair-shop-near-me/

    May 23, 2021 at 14:16 | Report abuse | Reply
  17. van conversions orange county ca

    bookmarked!!, I really like your blog!

    http://crl.ucsd.edu/cgi-bin/ax.cgi?http://ocrvcenter.com/boom-truck-repair-near-me/

    May 23, 2021 at 16:08 | Report abuse | Reply
  18. RV Entertainment System Los Angeles

    bookmarked!!, I really like your blog!

    https://client.paltalk.com/client/webapp/client/External.wmt?url=https://kameronwtpbh.blognody.com/3155911/everything-about-rv-mechanic-near-me

    May 23, 2021 at 18:02 | Report abuse | Reply
  19. Social Media Marketing Businesses Near Me

    http://www.courseindex.com/coursead/redirect?ad_id=95&url=https://affordableranking.com/

    May 23, 2021 at 20:51 | Report abuse | Reply
  20. Soosteemocush

    lowest price cialis where to buy cialis without prescription tadalafil goodrx https://tadagatadalafil.com/

    May 23, 2021 at 21:48 | Report abuse | Reply
  21. BbshMile

    viagra commercial girl http://loxviagra.com/ – viagra jelly viagra vs cialis

    May 24, 2021 at 00:13 | Report abuse | Reply
  22. Tembepteriope

    https://tadacipetadalafil.com/ cialis at canadian pharmacy cost tadalafil generic cheap generic cialis for sale cheap cialis pills for sale

    May 24, 2021 at 07:00 | Report abuse | Reply
  23. toy hauler remodel

    Greetings! Very helpful advice in this particular post! It's the little changes that will make the most important changes. Thanks a lot for sharing!

    https://mobile.vhda.com/director.aspx?target=https://ocrvcenter.com/rv-repair-shop-aliso-viejo-california/

    May 24, 2021 at 07:14 | Report abuse | Reply
  24. hvac services fayetteville nc

    Thank you, I've just been looking for information approximately this topic for a long time and yours is the greatest I have discovered so far. But, what in regards to the conclusion? Are you certain concerning the supply?

    https://www.lwc-london.com/hvac-repair-are-you-planning-for-professional-help/

    May 24, 2021 at 10:36 | Report abuse | Reply
  25. GtnbCrulk

    female viagra amazon https://jokviagra.com/ how was viagra discovered

    May 24, 2021 at 14:12 | Report abuse | Reply
  26. RV Upgrades California

    http://biyougeka.esthetic-esthe.com/rank.cgi?mode=link&id=848&url=comprandovino.com/blog/8_VINOS-PARA-NAVIDAD.html

    May 24, 2021 at 14:21 | Report abuse | Reply
  27. Local Marketing Firms

    http://mediapointe.net/__media__/js/netsoltrademark.php?d=affordableranking.com

    May 24, 2021 at 15:44 | Report abuse | Reply
  28. RV Dent Repair California

    http://www.guru-pon.jp/search/rank.cgi?mode=link&id=107&url=https://megancajigasfoundation.org/wpid-20140507_100839-jpg/

    May 24, 2021 at 18:51 | Report abuse | Reply
  29. RV TV California

    I quite like looking through a post that can make people think. Also, thank you for permitting me to comment!

    http://aslplayerservices.org/__media__/js/netsoltrademark.php?d=ns501960.ip-192-99-8.net/article/actualites/debats-montreal/lemieux-réagit-aux-engagements-d-harel

    May 24, 2021 at 18:54 | Report abuse | Reply
  30. RV Supplies Near Me

    /

    May 24, 2021 at 20:48 | Report abuse | Reply
  31. rv window replacement near me

    https://mitsui-shopping-park.com/lalaport/iwata/redirect.html?url=http://mediadepo.ru/component/k2/item/1-the-chicago-cubs-finally-have-a-plan?start=815230

    May 24, 2021 at 21:07 | Report abuse | Reply
  32. rv glass repair near me

    Aw, this was an incredibly good post. Finding the time and actual effort to generate a really good article… but what can I say… I hesitate a whole lot and never seem to get nearly anything done.

    http://czech-guide.aspone.cz/language.aspx?culture=cs-CZ&ReturnUrl=https://publiensayos.com/culture-shock-el-choque-cultural/

    May 24, 2021 at 22:29 | Report abuse | Reply
  33. RV Refrigerator Riverside

    Everything is very open with a precise description of the issues. It was really informative. Your site is very helpful. Many thanks for sharing!

    http://www.site-navi.net/sponavi/rank.cgi?mode=link&id=890&url=https://danielbraune.com.br/o-brasileiro-e-sua-memoria-fraca-de-apagado-maior-da-historia/

    May 24, 2021 at 22:31 | Report abuse | Reply
  34. furniture repair in orange county ca

    /

    May 24, 2021 at 22:41 | Report abuse | Reply
  35. Social Media Marketing Businesses Near Me

    https://www.sculptmydream.com/sdm_loader.php?return=https://affordableranking.com

    May 24, 2021 at 22:56 | Report abuse | Reply
  36. Internet Marketing Specialists

    https://www.spacioclub.ru/forum_script/url/?go=https://www.juicycalls.com

    May 24, 2021 at 23:16 | Report abuse | Reply
  37. Forklift Rental California

    Aw, this was a really good post. Taking the time and actual effort to create a great article… but what can I say… I put things off a lot and don't seem to get nearly anything done.

    http://nudewwedivas.forumcommunity.net/m/ext.php?url=http://forkliftswildwestlifttrucks.com/lull-forklift-repair-orange-county-california

    May 24, 2021 at 23:20 | Report abuse | Reply
  38. Forklift Extensions

    Your style is so unique in comparison to other folks I've read stuff from. Many thanks for posting when you've got the opportunity, Guess I'll just book mark this page.

    https://www.tinyportal.net/proxy.php?request=http://forkliftswildwestlifttrucks.com/forklift-parts-orange-county-california

    May 25, 2021 at 00:18 | Report abuse | Reply
  39. JebgEncox

    pharmacy wholesalers canada https://pharmacylo.com/ Retrovir

    May 25, 2021 at 00:28 | Report abuse | Reply
  40. Forklift Parts Near Me

    Having read this I thought it was really enlightening. I appreciate you spending some time and energy to put this short article together. I once again find myself spending a lot of time both reading and posting comments. But so what, it was still worth it!

    https://www.rya.org.uk/coursestraining/professional/pages/redir.axd?ciid=671&cachename=advertising&pagegroupid=212&url=http://www.forkliftswildwestlifttrucks.com/johnston-forklift-repair-orange-county-california

    May 25, 2021 at 01:06 | Report abuse | Reply
  41. Content Marketing Firm

    http://www.lescompagnonsduloup.forums-actifs.com/bw?dest=http3A2F2Faffordableranking.com

    May 25, 2021 at 01:23 | Report abuse | Reply
  42. Forklift Repair Shop Orange County

    https://www.podcastone.com/site/rd?satype=40&said=4&aaid=email&camid=-4999600036534929178&url=https://forkliftswildwestlifttrucks.com/warehouse-forklift-repair-orange-county-california/

    May 25, 2021 at 01:26 | Report abuse | Reply
  43. Used Forklift For Sale California

    I love it when people get together and share ideas. Great blog, keep it up!

    https://eservices.dls.moi.gov.cy/translationCatalog.aspx?redPage=https://forkliftswildwestlifttrucks.com/toyota-forklift-repair-orange-county-california

    May 25, 2021 at 01:42 | Report abuse | Reply
  44. Tritreviewifind

    generic cialis online fast shipping https://tadalafilww.com/ – what is tadalafil tadalafil blood pressure tadalafil side effects https://tadagatadalafil.com/

    May 25, 2021 at 02:08 | Report abuse | Reply
  45. SEO Marketing Consultant

    http://letronc-m.com/redirector?url=meticulousjess.com/

    May 25, 2021 at 03:11 | Report abuse | Reply
  46. SEO Marketing Business

    http://www.greatpointinvestors.com/__media__/js/netsoltrademark.php?d=affordableranking.com

    May 25, 2021 at 04:23 | Report abuse | Reply
  47. Local Marketing Service

    http://isadoctoronboard.com/__media__/js/netsoltrademark.php?d=affordableranking.com

    May 25, 2021 at 04:28 | Report abuse | Reply
  48. Internet Marketing Mechanics

    Hi there! This blog post couldn’t be written much better! Looking at this post reminds me of my previous roommate! He continually kept talking about this. I am going to send this post to him. Pretty sure he will have a very good read. I appreciate you for sharing!

    http://www.rioteens.net/cgi-bin/a2/out.cgi?id=198&l=top3&u=http://affordableranking.com/

    May 25, 2021 at 04:32 | Report abuse | Reply
  49. Forklift Tires California

    Way cool! Some extremely valid points! I appreciate you penning this write-up plus the rest of the site is extremely good.

    http://gar86.tmweb.ru/bitrix/rk.php?goto=https://forkliftswildwestlifttrucks.com/norwalk-forklifts

    May 25, 2021 at 05:17 | Report abuse | Reply
  50. LbsoZisse

    cheap generic cialis online http://ucialisdas.com/ where can i buy cialis in singapore

    May 25, 2021 at 05:22 | Report abuse | Reply
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35

Leave a Reply to tv repair in temecula


 

CNN welcomes a lively and courteous discussion as long as you follow the Rules of Conduct set forth in our Terms of Service. Comments are not pre-screened before they post. You agree that anything you post may be used, along with your name and profile picture, in accordance with our Privacy Policy and the license you have granted pursuant to our Terms of Service.

Advertisement
About this blog

Get a behind-the-scenes look at the latest stories from CNN Chief Medical Correspondent, Dr. Sanjay Gupta, Senior Medical Correspondent Elizabeth Cohen and the CNN Medical Unit producers. They'll share news and views on health and medical trends - info that will help you take better care of yourself and the people you love.