The Chemistry And Physiology Of Digestion For food to be utilized by the body, it must first undergo a series of processes which we call digestion. After we perform the only really voluntary actions involved in the process of nutritionâputting the food into our mouths, chewing and swallowingâthe balance of the digestive process is the function of the autonomic or involuntary nervous system. The changes which foods undergo are largely effected by enzyme and digestive juices.
Definition of process for English Language Learners. : 1  a series of actions that produce something or that lead to a particular result. : 2  a series of changes that happen naturally. 3  medical : something that sticks out of something else.
A procedure is a sequence of steps for completing a given activity. A procedure may outline the manner in which a particular policy is to be implemented, but it cannot take the place of that policy. Recall that a good policy is inviolate, that is, policies change slowly and infrequently if at all.