Medications

Do known drugs help against SARS-CoV-2?

There are no therapeutics available that have been developed for COVID-19 treatment.Repurposing of already available medication for COVID-19 therapy is an attractive option to shorten the road to treatment development. The ...

Diseases, Conditions, Syndromes

China deploys anal swabs to test for COVID-19

China has begun using anal swabs to test those it considers at high risk of contracting COVID-19, state TV reported, with social media users and travellers squirming over the invasive procedure which doctors say can be more ...

Diseases, Conditions, Syndromes

What will COVID-19 look like years from now?

(HealthDay)—The bad news? COVID-19 may be around for a long, long time. The good news? Even if it does, new research suggests it could very well end up being just another mild illness, bringing with it inconvenience and ...

Diseases, Conditions, Syndromes

Yes, you still need to wear a mask after you get the COVID-19 vaccine

The country's first coronavirus vaccinations are now being distributed. The FDA granted the Pfizer vaccine emergency authorization for use, and it's expected that soon, possibly by this week, it will do the same for the Moderna ...

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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