The lungs take in oxygen. The
body's cells need oxygen to live and carry out their normal functions. They also get rid
of carbon dioxide. This is a waste product of the cells.
The lungs are 2 cone-shaped organs.
They are made up of spongy, pinkish-gray tissue. They take up most of the space in the
chest, or the thorax (the part of the body between the base of the neck and diaphragm).
They are inside a membrane called the pleura.
The lungs are separated by an area
(called the mediastinum) that has the following:
The right lung has 3 lobes. The left lung has 2 lobes. When you breathe, the air:
Enters the body through the
nose or mouth
Travels down the throat
through the voice box and windpipe
Goes into the lungs through
tubes (mainstem bronchi):
One of these tubes goes
to the right lung and one goes to the left lung
In the lungs, these
tubes divide into smaller bronchi
Then into even smaller tubes called bronchioles
Bronchioles end in tiny air sacs called alveoli