TRACTUS DIGESTIVUS
1. Menjelaskan struktur histologi tongue, pharynx, teeth
esophagus, stomach, small intestine dan large
intestine
2. Menjelaskan hubungan antara struktur histologi
dengan fungsi
• Tractus gastrointestinalis terdiri dari• Tunika mukosa• Tunika submukosa• Tunika muskularis• Tunika serosa• Tunika mukosa • Dilapisi epithelium, epithelium bersandar pada • membrana basalis• Lamina propria • Muskularis mukosa selapis tipis sel otot
polos• Submukosa : jar ikat padat
• Tunika muskularis : lap tebal otot polos tersusun
spiral
• internal: circular
• external:longitudinal
• Tunika serosa: jar ikat longgar ditutup epithelium
selapis pipih ( mesothelium )
• Pada beberapa tempat yang berhubungan dengan
organ lain serosa diganti adventitia tidak ditutup
mesothelium
Fungsi Tractus Digestivus
1. Memfasilitasi barier selektif permeabel
2. Memfasilitasi transport dan pencer mknan
3. Mengabsorbsi hasil digesti
4. Menghasilkan hormon yang mempengar aktivitas
sistem digesti
5. Menghasilkan mukus u/melumasi & proteksi
The digestive system
Major and layers organization of the digestive tract
Lip
Tongue and lingual papillae
Lingual papillae
Taste buds
• Sel enteroendocrin
• di stomach ........ Ghrelin.. meningkatkan nafsu makan
• G-pylorus.......... Gastrin.. Stimulasi asam lambung
• S-usus kecil....... Secretin..Secresi pancreatic
bicarbonat dan air
• Dpylorus ,duodenum....Somastatin..menghambat
sel endokrin dan sel lokal
Teeth
Dentin and odontoblasts
Ultrastructure of dentinal tubule
Ameloblasts and enamel
Tooth formation
Periodontium
Esophagus
Regions of the stomach
Wall of the stomach with rugae
Gastric pits and glands
Pyloric glands
Gastric glands
Parietal cells and chief cells
Ultrastructure of parietal cells
Synthesis of HCl by parietal cells
Ultrastructure of parietal, chief, and enteroendocrine cells
Absorptive surface of the small intestine
Plicae ciculares (folds) of the jejunum
Intestinal crypts or glands
Intestinal crypts or glands
Cells covering the villi
Lipid absorption and processing by enterocytes
Paneth cells
Microvasculature, lymphatics, and muscle in villi
Duodenal (Brunner) glands
Small intestine muscularis and myenteric plexus
Small intestine muscularis and myenteric plexus
Large intestine (colon)
Wall of the large intestine
Mucosa of the large intestine (colon)
Appendix
Mucosa of the recto - anal junction
Sekian & Terima kasih