Sleep apnea

Engineer studies sleep apnea

Most people snore occasionally, and about one in four Americans snore frequently. Snoring tends to increase with age and weight gain. And studies show that about 60 percent of adult males are habitual offenders. (Their spouses ...

Arthritis & Rheumatism

FDA: Gout drug uloric increases risk of death

(HealthDay)—The gout medicine Uloric (febuxostat) carries a higher risk of death than allopurinol, according to the U.S. Food and Drug Administration.

Psychology & Psychiatry

Take a deep breath: the art of mindfulness

The practice of mindfulness has been a hot topic recently, but what does mindfulness actually mean and how does one practice it? One Baylor College of Medicine expert discusses this.

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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.

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