For example nostrils of white people compared to black people it is getting smaller. What is the reason behind this diversity?

our nose shape Wondering what this key determining factor is?

In general, we think that nose structure is genetically determined.

Research on this topic, related to the nose structure It reveals deeper and more interesting findings. For example, imagine that whites have narrow and long noses, African Americans have flatter noses, and Asians have wide and round noses…

When we look at the nasal structures in different regions, we see that this diversity is not only genetic; at the same time from environmental factors We see that it is also being affected.

Research in recent years has shown how the shape of the nose is related to environmental conditions.

In 2016 Nature Communication A study published in the journal found that the genes that determine nose width, nasal bone, and nose tip shape are GLI3, PAX1, RUNX2, and DCHS2. It has also been suggested that these genes cause genetic changes that could explain how nose shape adapts to environmental conditions.

In other words, to adapt to cold climates, The nostrils were observed to form spontaneously. Sounds unbelievable, doesn’t it?

In another study, 3D facial modeling and measurements were performed on 476 volunteers of South Asian, East Asian, West African, and Northern European descent.

Research, Only two of the seven features of nose shape change. and reveals that these changes occur through natural selection rather than genetics. These findings also show us that nose shape is related to the process of adapting to the environment and may be a product of natural selection.

To put it more clearly, the narrow nostril regulates airflow in cold and dry climates. It provides better heating and humidification. This helps protect the airways in cold weather conditions.

On the other hand, in warm and humid climates wider nostrilsWhile it allows air to pass through more easily, it protects the intranasal mucosa by expelling excess moisture. As you can see, nostrils cover much more than just genetics.

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