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The respiratory system is an organ system which is used for gas exchange. Among four-legged animals, the respiratory system generally includes tubes, such as the bronchi, used to carry air to the lungs, where gas exchange takes place. A diaphragm pulls air in and pushes it out. Respiratory systems of various types are found in a wide variety of organisms. Even trees have respiratory systems.
Respiratory system in humans and other animals
In humans and other mammals, the respiratory system consists of the airways, the lungs, and the respiratory muscles that mediate the movement of air into and out of the body. Within the alveolar system of the lungs, molecules of oxygen and carbon dioxide are passively exchanged between the gaseous environment and the blood. Thus, the respiratory system facilitates oxygenation of the blood with a concomitant removal of carbon dioxide and other gaseous metabolic wastes from the circulation.(check)
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AARC: Secondhand Smoke - Facts that the American Association for Respiratory Care has learned in its search for information about secondhand smoke.
Asthma and Secondhand Smoke - Links and resources from the About.com.
Meta Description: [ Asthma information and help including asthma product reviews, asthma treatment options, asthma control, asthma action plans, asthma symptoms & triggers, asthma faq's, asthma terms glossary & how to's on treating and dealing with asthma from Asthma.About.com for parents of children with asthma and... ]
Health Effects of Secondhand Smoke: Respiratory Disease - Provides a bibliography of research on the effect of secondhand smoke on asthma, respiratory infections, and so on.
Noncancer Respiratory Health Effects of Environmental Tobacco Smoke in Adults - Online course from the American College of Chest Physicians covers effects of secondhand smoke on adult asthma.
Respiratory Effects of Secondhand Smoke in a Panel Study of Asthmatic and Symptomatic Children - Exposure to secondhand smoke was associated with a decline in peak flow and increases in respiratory symptoms and use of bronchodilator drugs among asthmatic children.
Respiratory Health Effects of Passive Smoking - EPA report covers only respiratory effects, not heart disease etc.
Secondhand Smoke Causes Women Decreased Lung Function - Secondhand smoke causes decreased lung function in women, especially women with asthma, according to a recent study.
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