Lungs
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what do they look like?
- the lungs are the main 1 organs and they are located in the chest cavity
- they are elastic, pink and 2
- they are surrounded by a thin two-layered membrane lining called 3 that protects them from rubbing against the 4
- the two lungs are not 5, the left one is 6 than the right one and it weighs about 100 grams 7
- the 8 lungs normally weighs 700 grams and the 9 600
- the 10 lung is separated into three 11 (upper, medium and lower) while the 12 lung
contains only two 13
- in the back of the left lung there is a big cavity for the heart, called "the 14 of the heart"
how do they work?
- they work in two 15:
16: 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
17: the air leaves the lungs, the diaphragm relaxes, the ribs and the sternum move downward and the lungs and the chest cavity 18, resuming their normal size
what' s their function?
- they purify the venous blood that comes from the pulmonary 19 and that will be sent back to the heart though the vena 20.
which organs are they linked to?
- they are linked to the heart through the vena 21 and the pulmonary 22, and to the nose through the 23 and the 24
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