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F. Shammas / 04
The Digestive SystemThe Digestive SystemANDAND
The The IIrritable rritable BBowel owel SSyndrome yndrome ((IBSIBS))
F. Shammas / 04
Constituents of the Digestive SystemConstituents of the Digestive System
The Gastro-Intestinal Tract
(alimentary tract – 10 m long)
The accessory organs of digestion
F. Shammas / 04
Functions
Stomach
Small intestine
Large intestine
Mouth
Esophagus
Ingestion, biting, chewing
Rapid transport of food to the stomach
Food mix, initial digestion, storage reservoir
Enzymatic digestionand nutrients absorption
Water absorption,storage of waste material
GI tract
Constituents of the GITConstituents of the GIT
F. Shammas / 04
The Mouth CavityThe Mouth Cavity ConstituentsConstituents
1. The teeth
2. The hard palate
3. The soft palate
4. The tongue
F. Shammas / 04
The PharynxThe Pharynx SubdivisionsSubdivisions
1. Nasopharynx
2. Oropharynx
3. Laryngopharynx
F. Shammas / 04
The EsophagusThe Esophagus
F. Shammas / 04
The StomachThe Stomach
F. Shammas / 04
The StomachThe Stomach
F. Shammas / 04
The Stomach and Adjacent Structures
Esophagus
Duodenum
Lower esophageal sphincter
Fundus
Body
Pyloric antrum
Stomach
Pyloric sphincter
F. Shammas / 04
The Small IntestineThe Small IntestineAnatomical DivisionsAnatomical Divisions
1. Duodenum (25 cm)
2. Jejunum (2.5 m)
3. Ileum (3.5 m)
F. Shammas / 04
Gastro-intestinal WallGastro-intestinal Wall
Mucosa
Submucosa
Muscularispropria
Serosa
Villifolds
F. Shammas / 04
The Small Intestine
Mucosa
SubmucosaSubmucosal plexus
Connective tissue
Circular muscle
Myenteric plexus
Longitudinal muscle
Villi
Muscularis mucosae
Lymphoid module
Lacteal
Muscularisexterna
Serosa
Crypts of Lieberkühn