Anatomy and Fisiology GIT

8/16/2019 Anatomy and Fisiology GIT

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Anatomi dan FisiologiSistem Pencernaan

Mekar dwi Anggraeni


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Small Intestine

• 90% of absorption occurs in the small intestine• A thousand fillus absorb water and micronutrinet


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Small Intestine

• The Duodenum

The segment of small intestine closest to stomach

!" cm #$0 in& long

'Mi(ing bowl) that recei*es chyme from stomach and

digesti*e secretions from pancreas and li*er

+unctions of the duodenum

• To recei*e ch,me from stomach

• To neutrali-e acids before the, can damage the absorpti*e

surfaces of the small intestine


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Small Intestine

• The .e/unum

Is the middle segment of small intestine

!" meters #! ft& long

Is the location of most• 1hemical digestion

• 2utrient absorption

Small *illi


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Small Intestine

• The Ileum

The final segment of small intestine

3" meters #$$4 ft& long

5nds at the ileocecal valve6 a sphincter that

controls flow of material from the ileum into

the large intestine


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Small Intestine

• Intestinal Secretions

7ater, intestinal /uice

$ liters per da, enter

intestinal lumen

Moisten ch,me

Assist in buffering acids

• Intestinal Mo*ements

1h,me arri*es in

duodenum

7eak peristaltic

contractions mo*e it slowl,

toward /e/unum

• M,enteric refle(es

• 2ot under 12S control

• 8aras,mpathetic stimulation

accelerates peristalsis


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arge Intestine

• Is horse:s shoe shaped

• 5(tends from end of ileum to anus

• ies inferior to stomach and li*er • +rames the small intestine

• Also called large bowel

• Is about $" meters #49 ft& long and ;" cm

#3 in& wide


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arge Intestine +unctions


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8arts of arge Intestine

• The 1ecum Is an e(panded pouch


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• The 1olon

>as a larger diameter and thinner wall than small

intestine

The wall of the colon• +orms a series of pouches #haustra&

>austra permit e(pansion and elongation of colon


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8arts of 1olon


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8arts of 1olon

• Ascending Colon

?egins at superior border of cecum

Ascends along right lateral and posterior wall of peritoneal

ca*it, to inferior surface of the li*er and bends at right colicflexure #hepatic fle(ure&

• Transverse Colon

1rosses abdomen from right to left@ turns at left colic flexure

#splenic fle(ure& Is supported b, trans*erse mesocolon

Is separated from anterior abdominal wall b, greater omentum


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8arts of 1olon

• The Descending Colon

8roceeds inferiorl, along left side to the iliac fossa

#inner surface of left ilium&

Is retroperitoneal6 firml, attached to abdominal wall• The Sigmoid Colon

Is an Sshaped segment6 about $" cm #= in& long

Starts at sigmoid flexure

ies posterior to urinar, bladder

5mpties into rectum


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Umbai Cacing (Appendix

• Bmbai cacing atau apendiks adalah organ tambahan

pada usus buntu

• Infeksi pada organ ini disebut apendisitis atau radang

umbai cacing

• Apendisitis ,ang parah dapat men,ebabkan apendiks

pecah dan membentuk nanah di dalam rongga abdomen

atau peritonitis #infeksi rongga abdomen&


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8h,siolog, of the arge Intestine

• Absorption in the arge Intestine


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Three Citamins 8roduced in the arge Intestine

$ Citamin #fat soluble&E

•


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• Grganic 7astes

?acteria con*ert bilirubin to urobilinogens and

strecobilinogens ?acteria break down peptides in feces and

generate

• Ammonia6 Indole H skatole6 h,drogen sulfide

?acteria feed on indigestible carboh,drates

#comple( pol,saccharides&

• 8roduce flatus6 or intestinal gas6 in large intestine



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• The


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Gn a sheet of paper6 write the

name of each colored organE

• reenE

•


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>ow:d ,ou doK

• reenE 5sophagus

•

Anatomy and Fisiology GIT

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