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Define the following terms in your own words: defecation, peristalsis.   What is the role of the...

Define the following terms in your own words: defecation, peristalsis.  

What is the role of the following organs: stomach, small intestine, large intestine, esophagus, rectum.

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Answer #1

Defecation - Discharge of faeces from the body.

Peristalsis - The process of wavelike muscle contraction and relaxation that pushes ingested food through digestive tract towards the anus.

Role of organs.

Stomach - Stomach secrete acid and enzyme that digest food.

Small intestine - 90% of food digestion occurs in small intestine and its function is to absorb nutrients and minerals.

Large intestine - Milan function of large intestine is to absorb water from the remaining indigestible food matter and transmit the waste material out of the body.

Esophagus - It is a long thin muscular tube that helps food to travel from pharynx to stomach by the process of Peristalsis.

Rectum - It acts as a temporary storage place before faeces is expelled out of the body and to absorb minerals and nutrients the last time before faeces is put of the body.

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