Health

Should I take vitamin C or other supplements for my cold?

Last week, I had a shocking cold. Blocked nose, sore throat, and feeling poorly. This made me think about the countless vitamins and supplements on the market that promise to ease symptoms of a cold, help you recover faster, ...

Immunology

Resveratrol can help to reduce inflammation, study finds

A component of red wine and grapes can help control inflammation induced by a bacterial pathogen that is linked to upper respiratory tract inflammatory diseases such as asthma, chronic obstructive pulmonary diseases (COPD) ...

Health

I ran 100 miles in a day, this is what happened to my body

The marathon race has long been considered the ultimate test of human endurance. But the last few decades have seen growing numbers of runners regularly tackling distances exceeding the traditional marathon. So-called "ultra-marathon ...

Other

The Forsyth Institute expands key human microbiome database

A team of researchers from The Forsyth Institute, a global leader in oral health research, today announced they have added over 80 species to generate the expanded Human Oral Microbiome Database (eHOMD), an online index of ...

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Respiratory tract

In humans the respiratory tract is the part of the anatomy that has to do with the process of respiration.

The respiratory tract is divided into 3 segments:

The respiratory tract is a common site for infections. Upper respiratory tract infections are probably the most common infections in the world.

Most of the respiratory tract exists merely as a piping system for air to travel in the lungs; alveoli are the only part of the lung that exchanges oxygen and carbon dioxide with the blood.

Moving down the respiratory tract starting at the trachea, the tubes get smaller and divide more and more. There are estimated to be about 20 to 23 divisions, ending up at an alveolus.

Even though the cross-sectional area of each bronchus or bronchiole is smaller, because there are so many, the total surface area is larger. This means there is less resistance at the terminal bronchioles. (Most resistance is around the 3-4 division from the trachea due to turbulence.)

This text uses material from Wikipedia, licensed under CC BY-SA