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respiratory system
(redirected from lower respiratory tract)

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respiratory system: see respiration respiration, process by which an organism exchanges gases with its environment. The term now refers to the overall process by which oxygen is abstracted from air and is transported to the cells for the oxidation of organic molecules while carbon dioxide (CO
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respiratory system

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As air enters the nasal cavity through the nostrils, it is warmed and moistened by mucous membranes …
(credit: © Merriam-Webster Inc.)
Organ system involved in respiration. In humans, the diaphragm and, to a lesser extent, the muscles between the ribs generate a pumping action, moving air in and out of the lungs through a system of pipes (conducting airways), divided into upper and lower airway systems. The upper airway system comprises the nasal cavity (see nose), sinuses, and pharynx; the lower airway system consists of the larynx, trachea, bronchi, bronchioles, and alveolar ducts (see pulmonary alveolus). The blood and cardiovascular system can be considered elements of a working respiratory system. See also thoracic cavity.
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3%) of 252 nasopharyngeal aspirates from hospitalized children with lower respiratory tract infection in Hunan Province, People's Republic of China.
Human bocavirus infection, People's Republic of China by Hou, Yun-De / Emerging Infectious Diseases
Centers for Disease Control and Prevention study that found that secondhand smoke hits children hard -- causes lower respiratory tract illness such as bronchitis and pneumonia, exacerbates asthma and increases the risk of middle-ear infections.
CITY CONSIDERS SMOKING BAN FOR PARKS, TRAILS by Daily News (Los Angeles, CA)
The factors controlled for in these analyses induded water damage or mild or mildew in the building during the first year of the child's life, any lower respiratory tract infection in the first year, male sex, African-American race, fall date of birth, and maternal IgE to Alternaria > 0.
Fungal levels in the home and allergic rhinitis by 5 years of age by Gold, Diane R. / Environmental Health Perspectives
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