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Why are there so many small branches within the lungs? a-to increase the surface area through which oxygen and carbon dioxide diffuse b-to hold the ribs up c-scientists are still gathering data about this
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Why are there so many small branches within the lungs?

a-to increase the surface area through which oxygen and carbon dioxide diffuse
b-to hold the ribs up
c-scientists are still gathering data about this
d-to move the chest up and down when you breathe

User GregoirePelegrin
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2 Answers

14 votes
A Amanda is a poopy fart
User Sceaj
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3 votes

Answer:

a

Step-by-step explanation:

because it's important for us to breathe

User Chrischris
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3.3k points
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