The lungs are a pair of organs in the chest that are responsible for breathing. When we breathe in, air passes from our nose or mouth, through the windpipe (trachea) and into two airways (bronchi), which enter the lungs. These airways divide to form smaller tubes, at the end of which are millions of tiny sacs. It’s here that oxygen is absorbed from the air and passes into the bloodstream to be circulated around the body. The lungs are surrounded by a protective lining that consists of two membranes called the pleura.
Posted on: Sat, 16 Nov 2013 17:42:53 +0000
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