Mainly 2 but in extreme cases one person could have 3. For example in the Guinness book of records it states that a boy was born with a tail.But if a person were to have 3 lungs only 2 would wor.
a human has two lungs one one each side of the chest (:
There are 3000 Alveoli in a healthy person's lung
lungs is a thing
If both lungs were removed, the person would die.
lungs
Lungs can be transplanted, if they are fresh.
There are a number of different reasons why a person's lungs might stop working. For instance, a person could become choked, and that would stop the lungs. Or, a person might have a disease like cystic fibrosis, where the lungs essentially give out.
in their lungs
Long lungs is also known as hyperexpanded lungs. When someone has long lungs it means that the person can't breath as much air as others with normal sizes lungs.
lungs
Well, if you take into account the density of air, you will realise that the main factor isn't how many lungs one has, but the strength of those lungs that decides whether a human survives or not. For example, my auntie has 3.14159~ lungs (above average) but she neglects the need to exercise them frequently. It is necessary to do exercises for your lungs at least twice a day to achieve maximum efficiency of the respiratory system. However, to answer your question, studies show that a person needs approximately 3.01x10^26 lung particles before they can rise above 12 years old.
Goldfish do not have lungs. Sorry but they have gills. =) Goldfishes do not have lungs. They have GILLS.