Multiple ChoiceWhy is it advantageous for the lungs to have a spongy structure rather than being empty like a balloon?17views
Multiple ChoiceWhat happens when your diaphragm relaxes and moves upward during the breathing process?67views
Multiple ChoiceWhat effect does contraction of the diaphragm have on airflow through the airways of the lungs?80views
Multiple ChoiceWhich of the following are necessary for oxygen to reach the cells of your body?72views