Lungs
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what do they look like?
- the lungs are the main
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organs and they are located in the chest cavity
- they are elastic, pink and
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- they are surrounded by a thin two-layered membrane lining called
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that protects them from rubbing against the
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- the two lungs are not
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, the left one is
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than the right one and it weighs about 100 grams
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- the
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lungs normally weighs 700 grams and the
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600
- the
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lung is separated into three
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(upper, medium and lower) while the
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lung
contains only two
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- in the back of the left lung there is a big cavity for the heart, called "the
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of the heart"
how do they work?
- they work in two
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:
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: the air reaches the lungs, the diaphragm contracts and moves downwards, the ribs and the sternum move upward and the lungs and the chest cavity expand
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: the air leaves the lungs, the diaphragm relaxes, the ribs and the sternum move downward and the lungs and the chest cavity
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, resuming their normal size
what' s their function?
- they purify the venous blood that comes from the pulmonary
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and that will be sent back to the heart though the vena
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.
which organs are they linked to?
- they are linked to the heart through the vena
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and the pulmonary
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, and to the nose through the
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and the
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