All of your organs are important but some of them are totally vital to your continuing existence. Two of these are your lungs. Not the fact you have two? That shows how important they are. The lungs take in air. Air is a combination of several invisible gases of which Nitrogen is the most with oxygen as the second. There is also a bit of Argon and Carbon Dioxide in there as well. Our bodies need this to live. In fact all mammalian and piscine life needs this to live. The Earth via it’s trees provides this Oxygen for us.
To protect our lungs from harmful substances we can protect them with an R Shield Mask. They filter out anything that could do some damage like pollution and commutable diseases.
The lungs’ role is to convert this oxygen and air into the blood stream so that you can “burn” the food that you ingest. The spongy lungs expand and contract as you breathe in and out. Their job is to take the oxygen and get it to every part of the body. This is why an excellent lung capacity is important. Some free divers can hold their breath for up to 7 minutes.