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[[Image:Lungs.jpg|240px|thumb|Bronchi and Lungs]]
[[Image:Lungs.jpg|240px|thumb|Bronchi and Lungs]]
'''Lungs''' are organs that are in the chest. Humans have two of them. They contain the bronchioles, the alveolar ducts and the alveoli. They can hold about 6 liters of [[air]].
'''Lungs''' are respiratory organs that are occupying the chest cavity. Humans have two of them. They contain the bronchioles, the alveolar ducts and the alveoli. They can hold about 6 liters of [[air]].
<blockquote>
<blockquote>
Lungs' main job is to make [[oxygen]] available to the body and to remove gases, such as [[carbon]] dioxide. The right lung has three sections, called lobes, and is a little larger than the left lung, which has two lobes. [http://my.clevelandclinic.org/anatomy/lung/hic_How_Your_Lungs_Work.aspx]
Lungs' main job is to make [[oxygen]] available to the body and to remove gases, such as [[carbon]] dioxide. The right lung has three sections, called lobes, and is a little larger than the left lung, which has two lobes. [http://my.clevelandclinic.org/anatomy/lung/hic_How_Your_Lungs_Work.aspx]
An artery, and a vein enter each lung medially at the hilum... A small network of blood capillaries in the walls of the alveoli affords surfaces for the actual exchange of gases. [http://www.answers.com/topic/lung]
</blockquote>
</blockquote>
== External links ==
== External links ==