A student has a hamburger fries and a soda for lunch. These foods must be changed by the digestive system in order to be used by the body Which if the following describes the processes that occur during digestion as food enters the mouth and passes through the other organs of the digestive system.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.