Navigation Links
The big male nose
Date:11/18/2013

Human noses come in all shapes and sizes. But one feature seems to hold true: Men's noses are bigger than women's.

A new study from the University of Iowa concludes that men's noses are about 10 percent larger than female noses, on average, in populations of European descent. The size difference, the researchers believe, comes from the sexes' different builds and energy demands: Males in general have more lean muscle mass, which requires more oxygen for muscle tissue growth and maintenance. Larger noses mean more oxygen can be breathed in and transported in the blood to supply the muscle.

The researchers also note that males and females begin to show differences in nose size at around age 11, generally, when puberty starts. Physiologically speaking, males begin to grow more lean muscle mass from that time, while females grow more fat mass. Prior research has shown that, during puberty, approximately 95 percent of body weight gain in males comes from fat-free mass, compared to 85 percent in females.

"This relationship has been discussed in the literature, but this is the first study to examine how the size of the nose relates to body size in males and females in a longitudinal study," says Nathan Holton, assistant professor in the UI College of Dentistry and lead author of the paper, published in the American Journal of Physical Anthropology. "We have shown that as body size increases in males and females during growth, males exhibit a disproportionate increase in nasal size. This follows the same pattern as energetic variables such as oxygenate consumption, basal metabolic rate and daily energy requirements during growth."

It also explains why our noses are smaller than those of our ancestors, such as the Neanderthals. The reason, the researchers believe, is because our distant lineages had more muscle mass, and so needed larger noses to maintain that muscle. Modern humans have less lean muscle mass, meaning we can
'/>"/>

Contact: Richard Lewis
richard-c-lewis@uiowa.edu
319-384-0012
University of Iowa
Source:Eurekalert  

Page: 1 2 3

Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
The big male nose
(Date:7/29/2014)... that have been plaguing the Northern Territories in Canada ... Lakes in the U.S. continue on. NASA,s Aqua ... Imaging Spectroradiometer, MODIS, instrument on July 26, 2014. Actively ... in red. Copious amount of smoke are drifting northward ... for residents of Yellowknife. Fire has caused power ...
(Date:7/29/2014)... at the University of Kent has shown for the ... a breakthrough that could have a major impact ... School of Biosciences uncovered the mechanism whereby the physical ... as actin filaments are ,fine-tuned, to undertake different ... to completely stable, providing a framework for the cell, ...
(Date:7/29/2014)... together two of the major disciplines behind Jurassic Park ... through stunning photographs and unique illustrations. , Fossil Insects, ... the incredible preservation and diversity of fossilised insects from ... remarkable fossils can tell us about the ancient and ... Like the mosquito in Jurassic Park, many of the ...
Breaking Biology News(10 mins):Unique images bring fossil insects back to life 2
... 24, 2011) -- Neither births nor deaths stop the flocking ... J. Toner of the University of Oregon. The notion, he ... new cancer therapies. Picture any scenario in which self-propelled ... fish, and even tiny plastic rods on a vibrating table ...
... saved an iconic Australian lizard species from death at the ... the March issue of The American Naturalist . It,s ... for the arrival of another, says Richard Shine, a biologist ... Cane toads were introduced in Australia in the ...
... injured, the rest of the school takes off in fear, tipped ... in German). Now, researchers reporting online on February 23 in the ... that scary stuff is really made of. Within that ... in fish skin. When a fish is wounded, fragments of the ...
Cached Biology News:New theory shows that neither birth nor death stops a flock 2New theory shows that neither birth nor death stops a flock 3Invasive plant protects Australian lizards from invasive toad: Study 2For fish, fear smells like sugar 2
(Date:7/30/2014)... CA (PRWEB) July 30, 2014 Adding ... their weighing boat special – Buy 2 ... free. This promotion will benefit lab technicians looking for ... Weighing boats are ideal for multiple applications including weighing ... a variety of choices including diamond-shaped, hexagonal, square, aluminum ...
(Date:7/29/2014)... Boston, MA (PRWEB) July 30, 2014 ... communication (UC) and collaboration company, is proud to ... and account management positions in their Boston, Charleston ... in response to the increased demand for hosted ... enhance operational efficiency and reduce cost. , SoundConnect ...
(Date:7/29/2014)... The advanced optical methods and applications ... driving a revolution in the neurosciences were the inspiration ... by SPIE, the international society for optics and ... launch of the BRAIN Initiative in the United States, ... a vision for and provide examples of the impact ...
(Date:7/29/2014)... Quantum Cheshire Cat: Can a particle be separated from ... Nature Communications , published the results of the first ... field, conducted by Chapman University in Orange, CA, and ... seen a cat without a grin," thought Alice in ... most curious thing I ever saw in my life!" ...
Breaking Biology Technology:Weighing Boat Promotion Now Available at Pipette.com, Major Pipette Distributor 2SoundConnect Organization and Culture is Evolving 2SPIE Launches 'Neurophotonics' Journal with Special Section on BRAIN Initiative 2SPIE Launches 'Neurophotonics' Journal with Special Section on BRAIN Initiative 3SPIE Launches 'Neurophotonics' Journal with Special Section on BRAIN Initiative 4The quantum Cheshire cat: Scientists separate a particle from its properties 2The quantum Cheshire cat: Scientists separate a particle from its properties 3The quantum Cheshire cat: Scientists separate a particle from its properties 4
... Sept. 5 Vical Incorporated,(Nasdaq: VICL ) ... Global Life,Sciences Conference will be webcast live on ... Vical,s President and Chief Executive Officer,Vijay B. Samant, ... programs, and strategic partnerships. The webcast will be,available ...
... 4, ev3 Inc. (Nasdaq: EVVV ) and FoxHollow,Technologies, ... has set,October 4, 2007 as the date of the ... merger with ev3. The record date for,determining stockholders entitled ... business on August 30, 2007. FoxHollow and ev3 anticipate ...
... HOUSTON, Sept. 4, 2007 Computing researchers at ... Nanyang Technological University (NTU) today announced the formation ... The joint research initiative, valued at 4 million ... production costs for embedded microchips -- special-purpose computer ...
Cached Biology Technology:Vical to Present at Upcoming Investor Conferences 2ev3 and FoxHollow Announce Date for Special Meeting of FoxHollow Stockholders to Vote on Proposed Merger 2ev3 and FoxHollow Announce Date for Special Meeting of FoxHollow Stockholders to Vote on Proposed Merger 3ev3 and FoxHollow Announce Date for Special Meeting of FoxHollow Stockholders to Vote on Proposed Merger 4ev3 and FoxHollow Announce Date for Special Meeting of FoxHollow Stockholders to Vote on Proposed Merger 5Rice, Nanyang Tech collaborate on sustainable nanoelectronics 2Rice, Nanyang Tech collaborate on sustainable nanoelectronics 3