US official: Research finds uranium in Navajo women, babies

About a quarter of Navajo women and some infants who were part of a federally funded study on uranium exposure had high levels of the radioactive metal in their systems, decades after mining for Cold War weaponry ended on ...

Dusty vacuums may be astronauts' biggest health risk

Human lungs have proven to be remarkably adaptable to life in space, but dust may their biggest challenge, even greater than the lack of gravity, according to a leading aerospace medicine expert, writing in the Medical Journal ...

Beijing to exit 200 most polluted cities list

Beijing's notoriously bad air quality has improved in recent years and the Chinese capital is expected to drop out of a list of 200 most polluted cities in the world this year, a data provider said Thursday.

'Sniff-cam' to detect disease

Having bad breath can mean someone ate a smelly lunch, but it could indicate that the person is sick. Various scent compounds have been linked to illnesses such as diabetes, lung cancer and Parkinson's disease, leading scientists ...

Gene activity database could spare thousands of mice

A comprehensive database of gene activity in mice across ten disease models, which could significantly reduce animal use worldwide, has been developed by scientists at the Francis Crick Institute, which gives a full picture ...

Medical groups warn climate change is a 'health emergency'

As Democratic presidential hopefuls prepare for their first 2020 primary debate this week, 74 medical and public health groups aligned on Monday to push for a series of consensus commitments to combat climate change, bluntly ...

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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