13:06:00
Here's an interesting trivia, did you know that the average person breathes in roughly 11,000 litres of the air daily? God give a good kind air as a quality without any payback. That's the equivalent of two elevator cars. Also have to tried counting the number of breaths you take in a day? If you did "means success", you will find that it could reach up to 22,000 liter, it's sound like an awesome or you will think what's will going on?
However, these marvelous feats wouldn't be possible if it weren't for certain organ in the body like a lung.
Flow air in and out
Take a deep breath. And now you release all of it out. It's so easy, isn't it? But while breathing seems so effortless, what goes on behind this process is much more complicated process in lung. Let's take it look.
Breathing begins at the nose and mouth. Upon inhaling, air will travel down the throat and into the windpipe (trachea). The trachea then conducts the air into the lungs via tubular branches (bronchi). As a bronchi pass through the lungs,the branch into smaller and smaller passages called bronchioles, eventually ending in clusters of microscopic balloon"like air sacs". These sacs, which can total up to a whopping 500 million in each lung, are called alveoli.
The alveoli walls are enveloped in mesh of miniscule blood vessels(capillaries) which help keep the sacs constantly moist. This is important for aiding the absorption of oxygen through the alveoli walls and into the blood. Once the oxygen exits the lungs and is transported to the heart, which pumps is throughout the body. Through this process, oxygen along with other nutrients, are delivered to cells in the body. And as the cells use the oxygen, carbon dioxide is, in turn, produced as waste and absorbed into the bloodstream. The carbon dioxide is subsequently carried in the blood back to the lungs, where is exhaled from the body. Known as gas exchange, this vital process is performed automatically by the lungs.
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