Biology

Questions tagged [nose]

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Do the nasal cilia move the particles trapped in the mucus out of the nose or down the throat? [closed]

Do the nasal cilia move the particles trapped in the mucus out of the nose or down the throat? What is the direction of the pulse of the cilia? Is this changeable?
5
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0answers
116 views

What are these structures in blood from a nosebleed?

I decided to look at some blood from a nosebleed (not mine) under the microscope and took some pictures of the results. There many large orange structures interspersed within the blood cells and I'm ...
14
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1answer
1k views

Deliberately choosing one nostril to breathe through

James Nestor, on pp. 41-42 of his book Breath: the New Science of a Lost Art, claims the following. The right nostril is a gas pedal. When you're inhaling primarily through this channel, circulation ...
2
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0answers
61 views

How does sleep prevent our eyes from drying out?

If we don't sleep for about 16 hours, our eyes start to get dry, and no amount of eye drops helps. You use eye drops and then you're dry 10 minutes later. However, after you've slept for 8 hours, your ...
2
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0answers
30 views

Exhalation in human breath, through mouth or nose: which is most usual?

Until now I believed that breath exhalation through the mouth is common for most human beings, and this fact is implicit in several technical contexts of which I can think (sports, music, medical ...
0
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1answer
114 views

Is it possible for human beings to feed through the nose?

There is a prediction on a futurology site that food can be eaten by inhalation https://2050.earth/predictions/smell-can-feed-you Although aerosol foods do exist they are still eaten by the mouth. ...
2
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0answers
27 views

Can you convert smells to variables?

Is there a way to map smells to numerical values of different variables? I.e. With RGB colours, each colour is made up of numerical values from 0-255. For example, red is (255,0,0), and yellow is (...
1
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1answer
59 views

Viral susceptiility of Nose and eyes

I read that opening in our face like nose and eyes are one which get us infected with numerous communicable diseases like cold , flu ebola etc. Both these organs have preventive mechanism like nose ...
5
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1answer
3k views

Why does menthol clear a stuffy nose?

I've looked all around online for an answer to this. Some sites say menthol causes blood vessels in the nose to constrict, some sites say it causes blood vessels to expand. Many sites simply say it's ...
1
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2answers
659 views

Are nosebleeds unique to humans?

Are there other species that get nosebleeds? If so, do they occur for the same reasons that humans get nosebleeds? How would an animal stop a nosebleed?
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1answer
216 views

Why are nosebleeds easier to get in the winter?

I understand it probably has to do with the dry air, but what does dry air do to make nosebleeds so easy to get? For example, even gently blowing your nose can cause a nosebleed for some people during ...
1
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0answers
130 views

Can skin acclimatize to a the humidity level?

When the outdoor temperature is low, the absolute humidity is low because cold air holds less water. When the heat is turned up indoors the relative humidity decreases and during days with cold ...
3
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0answers
79 views

Why does the upper respiratory tract not fill with water when diving?

When we swim, I know we close the some of the vestibular folds in the larynx part of the throat to hold our breath (and to avoid water from getting into the lower respiratory tract, I suppose). I ...
3
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1answer
106 views

Are we deaf to water's taste/smell?

If we hold a rose in front of our nose for an hour, we can barely notice the smell after that duration, since the smell receivers ( Or the brain, I'm not an expert ) get used to it, and become sort of ...
3
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1answer
86 views

Cartilage regeneration

Why can we not regenerate cartilage in our ear and nose, while bones and flesh can heal? What makes it so resistant to regeneration. Can we artificially create it in the lab?
1
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1answer
86 views

Why is it unlikely that bathroom smells can pose health risks?

Based on a little bit of internet reading, it appears that odor molecules that enter your nose from human feces are of little concern to your health because the harmful stuff, like the pathogens, are ...
3
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1answer
2k views

Do pet animals and humans perceive good and bad smells differently

As the title says, just wondering if there is a difference in what animals like dogs and cats perceive as good smell vis a vis humans. Example : Smell of some flowers - great . Fart smells - bad.
3
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2answers
349 views

Is saturation of olfactory cells able to create a feeling of another odour when it stops?

I'm looking for at least one scientific study about how odours could impact human olfactory system and create some phenomenon that could be loosely compared to retina remanence. As an example, with ...
5
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0answers
385 views

When and why did humans start disliking the way we naturally smell? [closed]

Like many animals, humans produce a myriad of scents from sweating, bacteria, possibly pheromones, etc. Many of these scents are used throughout the animal kingdom for mate choice, recognition of ...
1
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1answer
89 views

Are there electron or proton receptors in our nose?

We can easily smell chlorine gas and its irritating odour, but we cannot smell oxygen gas. Do few protons and electrons make such difference to our olfactory receptors?
3
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1answer
330 views

When you blow through your nose while holding it closed to "depop" you ears, why do you sometimes feel it in your eyes?

After your ears have "popped", for example on a flight, I heard you are supposed to hold your nostrils closed and blow through your nose to readjust the pressure to the normal level. Why do you ...
0
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1answer
95 views

What are the reasons that soap has so different smell and flavour?

Everybody has tried to taste soap in their childhood. One would think that if soap has a tasty smell it would have tasty flavor too. But we know it is not true (in the common cases). But why is there ...
1
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1answer
824 views

Evolutionary advantages of wet nose of cats and dogs?

Everyone knows that some animals, at least cats and dogs, keep their noses wet and cool. But why did they evolve it? What evolutionary advantages does it provide? Smell-sensing cells need cooling for ...
6
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1answer
87 views

Does our nose detect only if there is change in odor?

If I enter a room with certain odor, I can sense the odor. However, if I stay there for some time I cannot sense it anymore. A new entrant to the room can still smell it or I have to leave the room ...
4
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1answer
4k views

Why do I breathe out of BOTH nostrils?

After reading the question why do I only breathe out of one nostril I realized that breathing out of both isn't common. I have always breathed out of both, and when I get a stuffy nose, or a runny ...
298
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3answers
281k views

Why do I only breathe out of one nostril?

I was just sitting with my hand next to my nose and I realized that air was only coming out of the right nostril. Why is that? I would think I would use both, it seems much more efficient. Have I ...
8
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2answers
36k views

Can nosebleeds cause death?

Can epistaxis or nosebleeds be a cause of death?
2
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0answers
74 views

Will breathing through mouth result in any disorders? [closed]

My nose is slightly bent. When I was born, I had an issue with breathing. My mom said that doctors had inserted a breathing tube in one of my nostrils. This tube may have caused the deformation. From ...
0
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0answers
43 views

How is the nasal secretion system of local immunity coupled with lymphatic circulation?

I started a thread about Nasal chronic Inflammation after influenza virus here. However, I do not understand enough well the structure of the nose to answer the questions there. I know that the lysed ...

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