Oxygen goes in, carbon dioxide goes out. Sounds simple enough, but your respiratory system — composed of your lungs, trachea, sinuses, and sundry microscopic helpers — works a grueling 24/7 job just to keep your blood oxygenated, and your body alive. Learn all about the air you breath (and the respiratory organs that make it possible) here.
Before the dinosaur age, the coelacanth — a hefty, mysterious fish that now breathes with its gills — sported a well-developed lung, a new study finds.
Like its modern-day descendants, an ancient big fish known as a coelacanth had gills, but it also sported a well-developed lung, a new study finds.
Doctors originally guessed, based on an x-ray, that the item in the 15-month-old girl's chest was a hairpin.
A new "4D" medical device has saved the lives of three baby boys with life-threatening breathing problems, researchers say.
There are three types of infections that can affect the inner of outer ear. Ear infections are most common in children.
An uncommon virus has caused clusters of severe respiratory illness among children in at least two U.S. states, according to the Centers for Disease Control and Prevention.
The bacteria that cause Legionnaires' disease may be living in your windshield washer fluid, new research finds. Legionnaires' disease is an uncommon type of pneumonia, but can be deadly.
You may think that coming down with a cold or the flu this time of year is inevitable, but there are some things you can do to reduce your risk of illness, experts say.
A man complaining of night sweats, fever and a persistent bloody cough was surprised to discover he had a nearly 3-inch ball of fungus growing in his left lung, according to a new case report.
A 57-year- old woman in Italy who went to the doctor with inflamed sinuses had an unusual diagnosis.