3. Which of the following will happen when we breathe in?
A. Diaphragm moves downward and chest cavity expands.
B. Diaphragm moves upward and chest cavity contracts
C. Both diaphragm and chest cavity move upward.
D. Both diaphragm and chest cavity move downward.
Answers & Comments
Answer:
D
Explanation:
because if you breath in the both diaphragm and chest are moving downward to breathing