Question

define digestive system and
define oesophagus.
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Answer 1

Answer:

digestive system:

                              The human digestive system consists of the gastrointestinal tract plus the accessory organs of digestion (the tongue, salivary glands, pancreas, liver, and gallbladder). Digestion involves the breakdown of food into smaller and smaller components, until they can be absorbed and assimilated into the body.

oesophagus:

                     The oesophagus is a muscular tube. It connects your mouth to your stomach. When you swallow food, the walls of the oesophagus squeeze together (contract). This moves the food down the oesophagus to the stomach. The upper part of the oesophagus is behind the windpipe (trachea).

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Answer 2

Explanation:

the breaking down of food into simpler substance with the help of organs is known as digestive system and digestion the other name of the food food by in the biological in the biological study is called oesophagus