Answer:
i think its d i may be wrong
Explanation:
Micrometer and millimeter
It is C.ti and o and you don’t have to make me brainlest
Answer is B.
As the diaphragm contracts and flattens, it increases the volume of the thorax where the lungs are located. This results in a decrease in pressure (Boyle’s Law, if you know it) that creates a pressure gradient from outside to inside. This is what causes air to move into the lungs.
