DIGESTIVE SYSTEM

=The Digestive System= [image:http://i.imgur.com/f63ixsI.png?1] ==Ingestion== [image:http://i.imgur.com/i3UcTGL.png] The process by which food enters the digestive system. Essentially this just involves putting food into the mouth. ==Physical Digestion== Physical digestion occurs when food is broken into smaller pieces by mechanical force. Breaking the food into smaller pieces increases the surface area that is available for chemical digestion, thereby allowing food to be digested more quickly. ==Chemical Digestion== Chemical digestion occurs when food is further broken down into its chemical components by the action of enzymes and other chemicals such as acids. Chemical digestion involves breaking bonds within the food particles to produce '''soluble''' food molecules that are '''small''' enough to be absorbed into the bloodstream.