What is the difference between chemical process and mechanical process in body

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Please find below the solution to the asked query        

Chemical processes in the body are one which ​involve chemical reactions to take place. e.g. digestion of protein by gastric juice is a chemical process. Gastric juice contain hydrochloric acid and pepsin which break down protein into peptides.  

Mechanical processes in the body are one which are performed spontaneously, without thinking. e.g. peristalsis which is the rhythmic contractions of muscular wall of stomach is a mechanical process. This helps in mixing the food with enzymes for effective digestion.

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mechanical is in the body.
chemical change is in growth of body.
 
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