in human alimentary canal name the site of complete digestion of various component of food . explain the process of digestion.
Answers
The site of complete digestion in human alimentary canal is small intestine.
Process:
The liver secretes bile and the pancreas secrete various digestive juices to digest the remaining nutrients in the small intestine.Pancreatic enzymes make it alkaline. Bile salt breaks the fat present in the form of large globules into smaller ones, increasing the efficiency of enzyme action. Enzymes like trypsin digest proteins and lipase break down fats. Intestinal juice converts proteins to amino acids, complex carbohydrate to glucose and fat into fatty acids and glycerol.
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■ MOUTH:-
♤ FLUID CALLED SALIVA SECRETED BY THE SALIVARY GLANDS.
♤ THE SALIVA CONTAINS AN ENZYME CALLED SALIVARY AMYLASE.
♤ FUNCTION :- BREAK DOWN STARCH INTO COMPLEX MOLECULE TO GIVE SUGAR.
HELP IN MOISTENS THE FOOD EASY FOR CHEWING AND SWALLOWING
■ OESOPHAGUS:-
♤ THE CANAL HAS MUSCLES THAT CONTRACT RHYTHMICALLY TO PUSH THE FOOD FORWARD & THIS MOVEMENT OF FOOD IS CALLED PERISTALTIC MOVEMENT WHICH OCCURS ALONG THE G.UT.
■ STOMACH:-
♤ GASTRIC GLANDS ARE PRESENT IN STOMACH.
♤ IT RELEASE HYDROCHLORIC ACID (HCL).
♤ FUNCTION:- KILL HARMFUL BACTERIA THAT ENTERS WITH THE FOOD.
MAKES THE MEDIUM ALKALINE.
♤ PEPSIN:- THEY ARE PROTEIN DIGESTED ENZYME.
♤ MUCUS:- PROTECTS THE INNER LINING OF THE STOMACH FROM THE ACTION OF HYDROCHLORIC ACID.
■ SMALL INTESTINE:-
♤ THE EXIT OF FOOD FROM THE STOMACH IS REGULATED BY A SPHINCTER MUSCLE.
♤ IT HELPS IN DIGESTION OF CARBOHYDRATES, PROTEINS AND FATS.
■ LIVER :- IT SECRETE BILE JUICE IN GALL BLADDER.
♤ FUNCTION:- TURN ACIDIC MEDIUM TO ALKALINE.
EMULSIFY THE ACTION OF FAT.
♤ PANCREAS:- IT SECRETE PANCREATIC JUICE IT CONTAIN ENZYME LIKE:-
♤ TRYPSIN :- HELPS IN BREAK DOWN OF PROTEINS.
♤ LIPASE :- CONVERT FAT INTO FATTY ACID AND GLYCEROL.
■ INTESTINAL JUICE:- THE WALL OF SMALL INTESTINE CONTAIN GLAND WHICH SECRETE INTESTINAL JUICE.
♤ FUNCTION :- CONVERT PROTEINS TO AMINO ACIDS.
♤ COMPLEX CARBOHYDRATES INTO GLUCOSE.
♤ FATS INRO FATTY ACIDS AND GLYCEROL.
■ VILLI:- THE INNER LINING OF THE SMALL INTESTINE HAS NUMEROUS FINGER LIKE PROJECTIONS CALLED VILLI.
♤ FUNCTION:- INCREASE THE SURFACE AREA FOR ABSORPTION.
THEY ARE RICHLY SUPPLIED WITH BLOOD VESSELS WHICH TAKE THE ABSORBED FOOD TO EACH AND EVERY CELL OF THE BODY
■ LARGE INTESTINE:-
THE EXIT OF WASTE MATERIAL FROM THE BODY IS REGULATED BY THE ANAL SPHINCTER.