http://abdellab.sunderland.ac.uk/lectures/Gastro/IBD02.html

1
http//abdellab.sunderland.ac.uk/lectures/Gastro/I
BD02.html
2
FUNCTIONS OF THE ORAL CAVITY

• MECHANCAL DIGESTION
• LUBRICATION OF FOOD
• CHEMICAL DIGSTION
• AMYLASE CARBOHYDRASE

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THE STOMACH

• MECHANICAL DIGESTION 3 TANGENTIALLY ARRANGED
  MUSCLE LAYERS
• CHEMICAL PEPSIN GENERAL PROTEASE pH OPTIMUM
  2-3.
• CHIEF CELLS SECRETE PEPSIN
• PARIETAL CELLS SECRETE HCL

4
http//www-medlib.med.utah.edu/WebPath/GIHTML/GI18
6.html
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SMALL INTESTINES

• PLICAE AND VILLI INCREASE SA
• ABSORPTION VILLI AND MICROVILLI
• DIGESTIVE ENZYMES FROM CRYPTS
• LACTEALS ABSORPTION OF FATS

6
http//www.udel.edu/Biology/Wags/histopage/colorpa
ge/csi/csiipcv.gif
7
http//www-medlib.med.utah.edu/WebPath/GIHTML/GI16
2.html
8
http//bh.knu.ac.kr/sdsong/images/HB12-Anatomy20
of20Small20Intestine.gif
9
remf.dartmouth.edu/. ../source/1.html
10
http//www.biu.soton.ac.uk/microvilligallery.htm
11
http//www.kumc.edu/instruction/medicine/anatomy/h
istoweb/gitract/gi18a.htm
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ACCESSORY ORGANS

• PANCREAS
• ENDOCRINE FUNCTION
• ISLET CELLS INSULIN GLUCAGON
• DIGESTIVE ENZYMES
• CHYMOTRYPSIN
• TRYPSIN
• CARBOXY- AND AMINO- PEPTIDASES
• ENDO- AND EXO- NUCLEASES
• AMYLASE AND OTHER CARBOHYDRASES
• LIPASES

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ACCESSORY ORGAN

• LIVER
• BILE FAT EMULSIFICATION

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http//www.med.umich.edu/1libr/aha/aha_pancreas_ar
t.htm
15
http//www.udel.edu/Biology/Wags/histopage/colorpa
ge/cp/cpai.gif
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LARGE INTESTINES

• Water absorption
• Symbiotic bacteria

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http//casweb.cas.ou.edu/pbell/Histology/Images/Sl
ides/Digestive/93.colon.10x.jpg
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NUTRITIONAL NEEDS

• ESSENTIAL AMINO ACIDS
• ESSENTIAL FATS
• VITAMINS - FAT SOULBLE A, D, E, K. - WATER
  SOLUBLE B AND C.
• MINERALS - Ca, K, Na, Mg, Mn, Cu.
• DEFICIENCIES KWASHIOKOR, SCURVY, BERI-BERI,
  PELLAGRA