Oncology & Cancer

Broken heart syndrome linked with cancer

One in six people with broken heart syndrome had cancer and they were less likely to survive for five years after it occurred, according to new international research in Journal of the American Heart Association.

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, ...

Diseases, Conditions, Syndromes

What happens to your body when your have COVID-19?

As the number of cases of COVID-19 rises, experts continue to learn more about the disease. They know that symptoms include fever, cough and shortness of breath. But what does the virus do inside your body to cause those ...

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) ...

Diseases, Conditions, Syndromes

How COVID-19 sheds when symptoms are relatively mild

Detailed virological analysis of nine adults from Munich, Germany, with comparatively mild symptoms of COVID-19 respiratory disease is reported in a paper published in Nature. The study shows that there is active replication ...

Diseases, Conditions, Syndromes

Reducing the risk of infection

"Biology shows us that there are additional ways to reduce the risk of serious coronavirus infections, in addition to hand hygiene and keeping distance," Viola Vogel writes.

Diseases, Conditions, Syndromes

Nasal vaccine against COVID-19 prevents infection in mice

Scientists at Washington University School of Medicine in St. Louis have developed a vaccine that targets the SARS-CoV-2 virus, can be given in one dose via the nose and is effective in preventing infection in mice susceptible ...

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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