Immunology

Life-threatening lung disease averted in experimental models

Idiopathic pulmonary fibrosis (IPF) is a fatal condition that leaves lung tissue permanently scarred and leads to the decline and eventual failure of the respiratory system. For those diagnosed with the disease, treatment ...

Health

Childhood body composition may influence future lung health

How well people breathe as adults may depend on the amount of fat mass and lean muscle mass they have as children, according to a new study led by scientists from the Barcelona Institute for Global Health (ISGlobal), a center ...

Diseases, Conditions, Syndromes

Lung neuropeptide exacerbates lethal influenza virus infection

Severe influenza virus infection is characterized by a strong inflammatory response and profuse viral replication in lungs. These viruses, such as the notorious avian flu, have a high rate of death and to date there are no ...

Cancer

Semaphorin linked to lung cancer treatment resistance

Lung cancer remains a major cause of mortality across the globe, although we are gaining a deeper understanding of the genetic background behind this disease, including the mutations that promote it. Mutation in the gene ...

Immunology

Friends' vaping could pose danger to kids with asthma

(HealthDay)—Add another danger that e-cigarettes pose to teenagers: A new study finds secondhand exposure to vaping may raise the chances of asthma attacks in adolescents with the respiratory condition.

Cancer

Cancer mortality milestone: 25 years of continuous decline

A steady, 25-year decline has resulted in a 27% drop in the overall cancer death rate in the United States, translating to approximately 2.6 million fewer cancer deaths between 1991 and 2016. The data come from Cancer Statistics, ...

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