Cancer

How a sleeping cancer awakens and metastasizes

Scientists at Cold Spring Harbor Laboratory (CSHL) have determined one of the ways in which cancers in remission can spring back into action. This knowledge has inspired a new treatment idea designed to prevent cancer recurrence ...

Cancer

Bacteria promote lung tumor development, study suggests

MIT cancer biologists have discovered a new mechanism that lung tumors exploit to promote their own survival: These tumors alter bacterial populations within the lung, provoking the immune system to create an inflammatory ...

Diseases, Conditions, Syndromes

Infinite hug mechanism may be key to lung fibrosis

Researchers have long known that fibrosis – scarred tissue and organs – is caused by a wound healing mechanism that goes awry beyond normal wound repair. Now, a group of researchers at the University of Toronto's Faculty ...

page 1 from 23

Lung

The 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")

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