Science digestive system

In order to be absorbed and used, food must be “digested”, that is, it must be broken down into small pieces. Each portion of this tube has a different shape and function. It starts at the mouth and ends at the anus.

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The human digestive system includes all the gastrointestinal organs, including the mouth, stomach, intestines and other organs involved in digestion.

This diagram describes the basic organs of the digestive system.

Human digestive system gut gastrointestinal tract anatomy diagram

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The human digestive system starts with mouth and ends with anus. Intake of food into to mouth is called Ingestion.Mouth encloses a cavity within called Buccal cavity or Oral cavity. Three pairs of salivary glands pour their secretions called saliva in to this cavity. The muscular tongue pushes the food under grinding teeth as it mixes with saliva, this process is called "Mastication". Mastication makes the food into ball of paste. Salivary amylase" an enzyme in saliva starts the digestion of…

The Digestive System | Basic anatomy and physiology, Medical school essentials, Biology lessons