Oncology & Cancer

Mayo Clinic Minute: Symptoms of colorectal cancer

Colorectal cancer refers to a cancer that begins to form in the colon or the rectum. It's the second most common cause of cancer death in the U.S., behind lung cancer.

Diseases, Conditions, Syndromes

Amid pandemic, protest peacefully while staying healthy

You've watched police brutality protests unfold across America and you want to take part, but you fear that choice could raise your risk of coronavirus infection. Is there a way to express your outrage without endangering ...

Oncology & Cancer

Unique cells found in lung cancer patients may predict survival

Lung cancer is the leading cause of cancer-related deaths in the U.S. and most who are diagnosed with lung cancer do not survive five years. Non-small cell lung cancer (NSCLC) is the most common type where tumor cells shed ...

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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