DNA sequencing of bacteria found in pigs and humans in rural eastern North Carolina, an area with concentrated industrial-scale pig-farming, suggests that multidrug-resistant Staphylococcus aureus strains are spreading between ...
Mar 05, 2021
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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 ...
Mar 04, 2021
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University of Minnesota Medical School researchers studied SARS-CoV-2 infections at individual cellular levels and made four major discoveries about the virus, including one that validates the effectiveness of remdesivir—an ...
Feb 10, 2021
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Research into a new drug which primes the immune system in the respiratory tract and is in development for COVID-19 shows it is also effective against rhinovirus. Rhinovirus is the most common respiratory virus, the main ...
Feb 02, 2021
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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 ...
Jan 27, 2021
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Melatonin synthesized in the lungs acts as a barrier against SARS-CoV-2, preventing expression of genes that encode proteins in cells such as resident macrophages in the nose and pulmonary alveoli, and epithelial cells lining ...
Jan 27, 2021
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(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 ...
Jan 14, 2021
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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 ...
Dec 17, 2020
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COVID-19 has been found in conjunctival swabs and tears of infected patients, according to a new study published in The Ocular Surface.
Dec 10, 2020
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Anyone who has undergone a nasal swab or saliva test for COVID-19 knows that the virus is most easily detected in the nose and mouth. That's why, University at Buffalo researchers argue in a new paper, more COVID-19 studies ...
Nov 30, 2020
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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
