In humans, the food enters our body through mouth which is chewed into smaller pieces of food. After that we would swallow the food and it would enter our gullet which is then pushed down into the stomach. The saliva in our mouth also plays an important part in digestion. Stomach has acid which kills most contaminating microorganisms and begins to breaks down some of food. After a few hours the food travels to small intestine and even more digestive juices are added. This is the part where the nutrients are absorbes into the blood stream. Then the rest is moved into the large intestine where water and mineral salts are absorbed. The rest is excreted through the anus.
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