Foreign bodies of the eye. Health care

FUNDAMENTALS OF FIRST AID
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Foreign bodies of the eye. Health care

Fundamentals of First Aid (OPMP)

Small particles of metal and stone often fall into eye and cause damage. Very often small specks, grains of sand, insects get into the conjunctival sac.

Evidence

There is a profuse secretion of the eye (tears) and involuntary closing of the eyelids.

First aid

All sorts of home measures for extracting foreign bodies are completely unacceptable. Such patients need immediate special medical care.

Authors: Aizman R.I., Krivoshchekov S.G.

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The size and shape of the human nose determined by the climate 18.03.2017

Researchers from the Pennsylvania State University conducted a study of the size and shape of the noses of people in different parts of the world. It turned out that one of the determining factors was local climatic conditions.

The nose is an important organ, it purifies the air we breathe in, warms it up and moisturizes it before it enters the lungs, which helps prevent infections. Not to mention that it is one of the most expressive elements of the human face. Previous studies have already shown that those whose ancestors lived in a humid and warm climate are more likely to have wider nostrils, compared with the streams of those who lived in dry and cool areas - it remained unclear, this coincidence and there is a causal relationship. .

In this work, scientists examined the size and shape of the noses of people descended from the inhabitants of West Africa, South Asia and Northern Europe and came to the conclusion that the existing distribution cannot be explained by mere chance. In addition, wide nostrils are statistically related to ancestors that developed in warmer areas with higher absolute humidity, which climate played a role in their formation. However, the evolutionary history of the nose is quite complex, and there must have been other influences, such as cultural influences such as mate choice.

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