Transcript Lower G I T HISTOLOGY [PPT]

Histology of lower gastro
intestinal tract
By
Navneet kumar
Professor
Department of Anatomy
KGMU LKO
Dr Navneet Kumar Professor
Anatomy .KGMU LKO
Lower G.I.T
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• Intestine
Small Intestine
-Duodenum
-Jejunum
- ileum
Large intestine (Colon)
-Appendix
-Rectum
-Anal canal
Dr Navneet Kumar Professor
Anatomy .KGMU LKO
Gross features of intestine
• Small Intestine
• Villi
• Valve of kerckring (plicae
circularis)
• crypts of lieberkuhn
(intestinal glands)
• Large intestine
• No Villi
• Sacculation +nt
• Teania coli +nt
• Appendices epiploicae
Dr Navneet Kumar Professor
Anatomy .KGMU LKO
Dr Navneet Kumar Professor
Anatomy .KGMU LKO
Small intestine -Duodenum
1.Mucus membrane
-epithelium
-Intestinal villi
- Simple columnar
- Goblet cells
-lamina propria
intestinal glands (crypts
of lieberkuhn)
-muscularis mucosae
2.Submucosa
Brunner's gland
3.Musculalis layer
-inner circular
-outer longitudinal
4. Serosa
Dr Navneet Kumar Professor
Anatomy .KGMU LKO
Intestinal glands
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Absorptive cells
Paneth cells
Goblet cells
Endocrine cells
Dr Navneet Kumar Professor
Anatomy .KGMU LKO
Dr Navneet Kumar Professor
Anatomy .KGMU LKO
Duodenum
Dr Navneet Kumar Professor
Anatomy .KGMU LKO
Small intestine -Jejunum
1.Mucus membrane
-epithelium- Simple columnar
- intestinal villi
-lamina propria
intestinal glands (crypts of
lieberkuhn)
-solitary Lymphoid nodule
-muscularis mucosae
2.Submucosa
-NO gland
3.Musculalis layer
-inner circular
-outer longitudinal
4. Serosa
Dr Navneet Kumar Professor
Anatomy .KGMU LKO
Dr Navneet Kumar Professor
Anatomy .KGMU LKO
Dr Navneet Kumar Professor
Anatomy .KGMU LKO
Dr Navneet Kumar Professor
Anatomy .KGMU LKO
Small intestine -jejunum
Dr Navneet Kumar Professor
Anatomy .KGMU LKO
Dr Navneet Kumar Professor
Anatomy .KGMU LKO
Small intestine -ILeum
1.Mucus membrane
-Epithelium
- Simple columnar
- intestinal villi
-Lamina propria
intestinal glands (crypts of
lieberkuhn)
- Muscularis mucosae
2.Submucosa
-aggregated Lymphoid
nodule (peyers patches)
- mircofold cells (“M” Cell)
3.Musculalis layer
-inner circular
-outer longitudinal
4. Serosa
Dr Navneet Kumar Professor
Anatomy .KGMU LKO
Small intestine -ileum
Dr Navneet Kumar Professor
Anatomy .KGMU LKO
Dr Navneet Kumar Professor
Anatomy .KGMU LKO
Large intestine
1.Mucus membrane
-epithelium
- Simple columnar
- Goblet cells are more
- villi are absent
-lamina propria
intestinal glands (crypts
of lieberkuhn)
-muscularis mucosae
2.Submucosa
3.Musculalis layer
-inner circular
-outer longitudinal
4. Serosa or adventitia
Dr Navneet Kumar Professor
Anatomy .KGMU LKO
Dr Navneet Kumar Professor
Anatomy .KGMU LKO
Dr Navneet Kumar Professor
Anatomy .KGMU LKO
Large intestine
Dr Navneet Kumar Professor
Anatomy .KGMU LKO
Large intestine
Dr Navneet Kumar Professor
Anatomy .KGMU LKO
Appendix
1.Mucus membrane
-epithelium- Simple
columnar
- villi are absent
-lamina propria
intestinal glands (crypts of
lieberkuhn), lympgoid
tissue
-muscularis mucosae
2.Submucosa
Lymphoid nodule
3.Musculalis layer
-inner circular
-outer longitudinal
4. Serosa
Dr Navneet Kumar Professor
Anatomy .KGMU LKO
Dr Navneet Kumar Professor
Anatomy .KGMU LKO
Dr Navneet Kumar Professor
Anatomy .KGMU LKO
Appendix
Dr Navneet Kumar Professor
Anatomy .KGMU LKO
Dr Navneet Kumar Professor
Anatomy .KGMU LKO
Anorectal junction
Dr Navneet Kumar Professor
Anatomy .KGMU LKO