The structure of digestive tract are the mouth, stomach ,small intestine, large intestine, and anus .
The gastrointestinal tract is formed by four layers , mucosa ,submucosa, muscularis and serosa are the layers of digestive tract.
Mucosa is the innermost layer , submucosasubmucosa is above the mucosa , muscularis is the middle layer and serosa is the outermost layer of digestive tract
The functions of digestive tract is to digest the food , absorption of ingested nutrient and to excrete the waste products from the body . Most of the nutrients are ingested in a form that is either too complex for absorption or insoluble and incapable of being digested
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