How do the lungs work?

The

lungs provide oxygen to our body, which must generate energy in the form of adenosine triphosphate (ATP). ATP is an energy currency of the body and is essential for all energy -intensive cellular processes. Over the course of life, one can use your lungs to breathe a billion times. Animals breathe in oxygen and exhaled carbon dioxide, the opposite of plants.

The lungs are the central component of the respiratory system that is used for breathing. Fresh air comes to the mouth, down the trachea (trachea), to the lungs through the cartilage pathways called bronchi and bronchioles, where it is absorbed by small air bags called alveoli. Alveoli have a diameter of about 0.05 mm, but during inhalation it swells to 0.1 mm. For comparison, a typical cell has a size of about 0.01 mm. When the membrane is calm, the lungs open wide. When the membrane is tightened, the lungs are compressed and ejecting carbon dioxide. This process repeats continuously, even if we sleep.

alveoli exist in a finely branched structure, starting from a large prochot and continuing down to individual air bags. Due to this branch structure, they have a very large combined surface of about 750 - 1,000 square feet (70 - 90 square meters). This is similar to the field as a football field, although the lungs themselves are just as large as a few steaks.

Alveoli cover a network of capillaries - fine blood vessels. The alveoli oxygen is scattered into the bloodstream, which then travels to the heart where it is pumped around the body. Oxygenated blood is bright red, while deoxygenated blood has a bluish shade.

lungs are not just for breathing. They also play a role in blood filtering and heart protection that is almost surrounded by.