Answered

how does the movement of the diaphragm cause air to go in and out of the lungs

Sagot :

Kishalynviz
the lungs movement will deplete & expand . when you inhale it will deplete, and when yo exhale it will expand . 
Rodriguezmina94viz
When the diaphragm contracts we breathe in O² (inhalation process takes place).
When the diaphragm relaxes we take out CO² (exhalation process takes place).