What is the function of peristalsis in the following parts ?
(a) oesophagus (b) stomach (c) small intestine (d) large intestine
Answers
Answer:
. a) Oesophagus:
Peristalsis helps in pushing the food, down the oesophagus into the stomach.
b) Stomach:
Peristalsis helps in storing food, breaking down food down and mixing it with juices secreted by stomach lining.
Peristalsis in stomach helps in partial digestion of food called chyme.
c) Small intestine :
Peristalsis pushes the digesting food through small intestine.
It helps to mix the chyme to help in the digestive process.
Peristalsis also helps in absorbing nutrients from the digesting food into the blood.
d) Large intestine :
Peristaltic movements help to propel feces along the large intestine through colon, to the rectum for expulsion from the body...
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Oesophagus - Oesophagus is a long food pipe which carries food from mouth to stomach. Thus, Digestion does not occurs in oesophagus.
- Buccal Cavity : Buccal cavity consists tongue and teeth. Tongue is a muscular organ which helps in mixing food with saliva while teeth are responsible in cutting, tearing, grinding and chewing the food. Hence, digestion is also occurs in buccal cavity.
Small Intestine : Small intestine is the longest part of the alimentary canal. It is responsible for major digestion and absorption. It breaks the large fat molecules into smaller molecules. Thus, digestion is occurs in small intestine.
Stomach : Stomach is a J shaped part of an alimentary canal. It is a store house of food. It is responsible for softening the food its muscular walls of stomach helps in mixing the food properly. Stomach is also involved in digestion.
Large Intestine :It is shorter than small intestine.