Cancer

Sniffing out disease with smartphones

Gastric cancer, also known as stomach cancer, is the fifth most common cause of cancer-related deaths in Europe. Because of the lack of early signs specifically related to the disease, it's usually only detected at an advanced ...

Sports Medicine & Kinesiology

Mental prep for better performance

(HealthDay)—"Get your head in the game!" Coaches say it to players all the time to get them to focus. The same advice can help you be more enthusiastic about your workouts. Here are five ideas:

Immunology

Food allergies can strike at any age

(HealthDay)—You might be surprised to learn that food allergies can start in adulthood and involve a food you've eaten without a problem for your entire life.

Sleep apnea

Facing sleep apnoea

A 3-D scan of your face could be all it takes to detect your risk of sleep apnoea.

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Breathing

Breathing is the process that moves air in and out of the lungs. Aerobic organisms require oxygen to release energy via respiration, in the form of the metabolism of energy-rich molecules such as glucose. Breathing is only one process that delivers oxygen to where it is needed in the body and removes carbon dioxide. Another important process involves the movement of blood by the circulatory system. Gas exchange occurs in the pulmonary alveoli by passive diffusion of gases between the alveolar gas and the blood in lung capillaries. Once these dissolved gases are in the blood, the heart powers their flow around the body (via the circulatory system). The medical term for normal relaxed breathing is eupnea.

In addition to removing carbon dioxide, breathing results in loss of water from the body. Exhaled air has a relative humidity of 100% because of water diffusing across the moist surface of breathing passages and alveoli.

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