POWERPOINT PRESENTATION

NAME : ATHIRA.G.SUDHANOPTION : NATURAL SCIENCEREG No. : 181/14376004

NEW B.Ed COLLEGE NELLIMOODU

WELCOME

TOPIC: SMALL INTESTINE

INTRODUCTIONONE OF THE IMPORTANT ORGAN FOR IMMUNE DEFENCE.LARGEST ENDOCRINE ORGAN OF THE BODY.START FROM THE PYLORUS AND ENDS AT THE CECUM.IN THE SMALL INTESTINE FOOD THAT HAS ALREADY BEEN BROKEN DOWN BY CHEWING AND STOMACH ENZYMES IS FURTHER DEGRADED BY ADDITIONAL ENZYMES.

SIZE AND DIVISION

AVERAGE LENGTH OF SMALL INTESTINE

IN AN ADULT MALE 22 FEET 6 INCHES IN AN ADULT FEMALE

23 FEET 4 INCHES

It is the major part of digestion and absorption of

carbohydrate,protein,fat.

Primary function is to absorb the nutrients and minerals

found in food

THE SMALL INTESTINE IS WHERE MOST DIGESTION TAKES PLACE.

IT IS STRUCTURALLY DIVIDED INTO THREE PARTS.

JEJUNUMDUODENUMILEUM

DUODENUM MAJOR DISTINGUISHING FEATURE IS THE PRESENCE OF DUODENAL(BRUNNER’S) GLANDS IN THE SUBMUCOSA. WHERE MOST OF THE BREAKDOWN OF FOOD IN THE SMALL INTESTINE OCCURS.MUCOUS CELLS OF THESE GLANDS PRODUCE AN ALKALINE SECRETION.PROTECTS THE DUODENAL LINING FROM THE ACIDITY OF THE CHYME.RAISES THE LUMINAL pH TO THE OPTIMUM LEVEL FOR PANCREATIC ACTIVITY.EXHIBITS FINGER LIKE OR LEAFLIKE VILLI.

JEJUNUM

MANY PLICAE CIRCULARES HAS LONG LEAF LIKE VILLI AN INTERMEDIATE NUMBER OF GOBLET CELLS

THE KEY TO ITS IDENTIFICATION IS THAT ALTHOUGH IT HAS VILLI(PART OF THE SMALL INTESTINE),IT DOESNOT CONTAIN BRUNNER’S GLAND’S OR PEYER’S PATCHES.

ILEUM FINAL AND LONGEST SECTION OF THE SMALL INTESTINE.

JEJUNUM AND ILEUM BOTH SUSPENDED BY A DOUBLE LAYER OF PERITONEUM THAT ALLOWS THESE PARTS TO MOVE MORE FREELY WITHIN THE ABDOMEN.

RESPONSIBLE FOR THE FINAL STAGES OF PROTEIN AND CARBOHYDRATE DIGESTION.

HAS FEWER VILLI,WHICH ARE SHORT AND BROAD TIPPED.

RELATIVELY ABUNDANT GOBLET CELLS.

WITH IN THE INFOLDINGS, FINGER- SHAPED VILLI ARESEEN.

INTESTINAL VILLI ARE SMALL, FINGER LIKE PROJECTION THAT PROTRUDE FROM THE EPITHELIAL LINING OF THE INTESTINAL WALL.

DISORDERS

MAROPTHISIS CROHN’S DISEASE CELIAC DISEASE INFECTIOUS DISEASE

CONCLUSIONSMALL INTESTINE IS WHERE MOST DIGESTION TAKES PLACE.THE FOOD ABSORBED IN THE INTESTINE PASSES INTO THE BLOOD VESSELS COLLECTED BY A LARGE VEIN GOING TO THE LIVER ,FROM WHERE THE NUTRIENTS ARE DISTRIBUTED TO THE WHOLE BODY.FAT DO NOT PASSES DIRECTLY INTO THE BLOOD BUT INTO THE LYMPH WITHOUT PASSING THROUGH THE LIVER.

THANK YOU