Health

Raw milk: the benefits are unclear but the dangers are real

According to some of its online proponents, unpasteurised or "raw" milk can "heal the gut", boost the immune system, prevent allergies, give you healthier skin and even contribute to bodybuilding. Perhaps more common is the ...

Pediatrics

Breastfed Vietnamese babies have fewer health issues

Vietnamese infants who are fed with infant formula or prelacteal foods such as water and honey soon after birth are more likely to experience higher rates of hospitalization and childhood illnesses during their first year ...

Diseases, Conditions, Syndromes

Bacteria in pneumonia attack using bleaching agent

Research shows that bacteria use hydrogen peroxide to weaken the immune system and cause pneumonia. This according to a study at UmeƄ University and Stockholm University, Sweden. Hydrogen peroxide is also known as a bleaching ...

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.

Diseases, Conditions, Syndromes

Major differences in the risk of transmission in measles outbreaks

Research that may come to affect contact tracing and infection control measures in future measles outbreaks has now been presented. A study of an outbreak of measles in Gothenburg, Sweden, a year ago shows large differences ...

Medical research

Inhaled nanoparticles could treat lung cancer

QUT pharmaceutical scientist Dr. Nazrul Islam, from School of Clinical Sciences, said lung cancer was one of the most common cancers globally and one of the deadliest, being a leading cause of cancer deaths.

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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