Lung
hideThe lung or pulmonary system is the essential respiration organ in air-breathing animals, including most tetrapods, a few fish and a few snails. In mammals and the more complex life forms, the two lungs are located in the chest on either side of the heart. Their principal function is to transport oxygen from the atmosphere into the bloodstream, and to release carbon dioxide from the bloodstream into the atmosphere. This exchange of gases is accomplished in the mosaic of specialized cells that form millions of tiny, exceptionally thin-walled air sacs called alveoli.
In order to completely explain the anatomy of the lungs, it is necessary to discuss the passage of air through the mouth to the alveoli. Once air progresses through the mouth or nose, it travels through the oropharynx, nasopharynx, the larynx, the trachea, and a progressively subdividing system of bronchi and bronchioles until it finally reaches the alveoli where the gas exchange of carbon dioxide and oxygen takes place.
The drawing and expulsion of air (ventilation) is driven by muscular action; in early tetrapods, air was driven into the lungs by the pharyngeal muscles, whereas in reptiles, birds and mammals a more complicated musculoskeletal system is used.
Medical terms related to the lung often begin with pulmo-, from the Latin pulmonarius ("of the lungs"), or with pneumo- (from Greek πνεύμων "lung")
For more information about Lung, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
News tagged with lung
Braking news: Particles from car brakes harm lung cells
Nov 20, 2009 |
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Real-life particles released by car brake pads can harm lung cells in vitro. Researchers writing in BioMed Central's open access journal Particle and Fibre Toxicology found that heavy braking, as in an emergency stop, caused ...
Common pain relief medication may encourage cancer growth
Nov 18, 2009 |
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Although morphine has been the gold-standard treatment for postoperative and chronic cancer pain for two centuries, a growing body of evidence is showing that opiate-based painkillers can stimulate the growth and spread of ...
Cancer patients and doctors report drug side effects differently
Nov 17, 2009 |
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In clinical trials for cancer, it is standard for clinicians rather than patients to report adverse symptom side effects from treatments, such as nausea and fatigue. At present, patient self-reporting, although important, ...
When seconds count: Interventional radiology treatment for pulmonary embolism saves lives
Nov 11, 2009 |
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Catheter-directed therapy or catheter-directed thrombolysis -- an interventional radiology treatment that uses targeted image-guided drug delivery with specially designed catheters to dissolve dangerous blood clots in the ...
Ventilation treatment in prone position for ARDS does not provide significant survival benefit
Nov 10, 2009 |
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Despite a current suggestion that patients with acute respiratory distress syndrome be positioned lying face down while receiving mechanical ventilation, study results indicate that this positioning does not significantly ...
Drug shrinks lung cancer tumors in mice
Nov 10, 2009 |
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(PhysOrg.com) -- A potential new drug for lung cancer has eliminated tumours in 50% of mice in a new study published today in the journal Cancer Research. In the animals, the drug also stopped lung cancer ...
PET imaging response a prognostic factor after thoracic radiation therapy for lung cancer
Nov 06, 2009 |
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A rapid decline in metabolic activity on a PET scan after radiation therapy for non-small cell lung cancer is correlated with good local tumor control, according to a study presented by researchers at Thomas Jefferson University ...
Researchers link health-care debate to risk of dying in US and Europe
Nov 06, 2009 |
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The current health care debate in the United States is complicated. Trade-offs between heath care expenditures, lifestyle choices and life expectancy have been suggested but seldom clearly demonstrated. The U.S. spends on ...
Lung tissue generated from human embryonic stem cells
Nov 05, 2009 |
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Scientists in Belgium have successfully differentiated human embryonic stem cells (hESC) into major cell types of lung epithelial tissue using a convenient air-liquid interface. The technique, published in BioMed Central's ...
Cancer patients want honesty, compassion from their oncologist
Nov 04, 2009 |
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What do patients want from their radiation oncologists? The most significant preference is that more than one-third of female cancer patients (37 percent) prefer to have their hands held by their radiation oncologists during ...
New treatment option emerging for some with early stage lung cancer
Nov 04, 2009 |
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Patients with early stage, non-small cell lung cancer who are not able to undergo surgery, now have a highly effective treatment option. Physicians say that option, radical stereotactic radiosurgery performed with CyberKnife, ...
PET imaging before radiation not ideal for determining boost radiation doses
Nov 03, 2009 |
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(PHILADELPHIA) Positron emission tomography (PET) imaging of non-small cell lung cancer prior to receiving radiation therapy should not be the basis for determining areas that may benefit from higher doses of radiation, according ...
Intervals between lung cancer diagnosis and treatment displays a health care disparity
Nov 03, 2009 |
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Research published in the November 2009 issue of the Journal of Thoracic Oncology has found that intervals between lung cancer suspicion, diagnosis and treatment may be attributed to health care system discrepancies.
Preventative brain radiation for lung cancer patients: Benefits and risks
Nov 02, 2009 |
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A new study is taking a closer look at the benefits versus risks for lung cancer patients to undergo preventative brain radiation therapy as a means to stop cancer from spreading to the brain.
Stereotactic radiotherapy stops lung cancer from growing in frail patients
Nov 02, 2009 |
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Stereotactic body radiation therapy (SBRT) stopped the growth of cancer at its original site in the lung for three years among nearly 98 percent of patients with early non-small cell lung cancer (NSCLC) who are unable to ...
