Question

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

Answer 1

A Amanda is a poopy fart

Answer 2

a

Step-by-step explanation:

because it's important for us to breathe