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Digestive System I : Gastrointestinal Tract, filiform papillae,…
Digestive System I : Gastrointestinal Tract
Rectum
Submucosa
Loose connective tissue with blood vessels, lymph follicles and the Meissner's plexus
Muscularis externa
Skeletal muscle 2 layer
Inner circular
Outer longitudinal
Mucosa
Simple columnar epithelium
Many crypt of Lieberkuhn
Serosa or Adventitia
Loose connective tissue
Small & Large Intestines
Small intestine
Jejunum
Mucosa
Epi: Simple columnar with goblet cells
Lamina: intestinal gland (simple straight tubular g.) หลั่ง intestinal juice
Submucosa
No gland มีPlica circular อยู่ระหว่าง mucosa และ submucosa ที่ยกตัว
Muscularis externa
Smooth muscle 2 layer
1.inner circular
2.outer longitudinal
Serosa or Adventitia
Serosa (visceral peritoneum)
Ileum
Submucosa
Peyer’s patches
Muscularis externa
Smooth muscle 2 layer
1.inner circular
2.outer longitudinal
Mucosa
Epi: Simple columnar with goblet cells
Lamina: intestinal gland (simple straight tubular g.)
Serosa or Adventitia
Serosa (visceral peritoneum)
Duodenum
Submucosa
Brunner’s gland ผลิต alkaline mucous (base)
Muscularis externa
Smooth muscle 2 layer
1.inner circular
2.outer longitudinal
Mucosa
Epi: Simple columnar epith.
Lamina: intestinal gland (simple straight tubular g.) or crypt of Leiberkunh
Serosa or Adventitia
Adventitia (without peritoneum)
Large intestine
Large intestine
Submucosa: no gland
Muscularis externa: smooth m. 2 layer
1.inner circular
outer longitudinal
Mucosa : no villi
Serosa (visceral peritoneum)
Appendix
Submucosa : lymphoid tissue, lymphatic nudule
Muscularis externa : smooth m.2 layer
1.inner circular
2.outer longitudinal
Mucosa : Epi: Simple columnar with goblet cells Lamina propria: many lymphoid tissue, lymphatic nudule
Mesithelium ( visceral peritineum)
Stomach
Submucosa
Loose CNT. With collagen, elastic fiber
Muscularis externa
Smooth m. 3 layer
2.Middle circular
3.Outer longitudinal
1.Inner oblique
Mucosa
Epi: Simple columnar epith.
Lamina: gastric gland
2.Chief cells ติดนง. นิวเคลียสขอบ หลั่ง pepsinogen, gastric lipase
3.Parietal cells ติดแดง นิวเคลียสกลาง หลั่ง HCL
1.Mucous neck cells หลั่ง mucous เพื่อเคลือบกระเพาะ
Serosa or Adventitia
Serosa (visceral peritoneum)
Esophagus
Submucosa
Esophageal gland
: mucous gland(ขาวๆ)
Muscularis externa
Upper: skeletal m.
Middle: skeletal, smooth m
Lower: smooth m.
Mucosa
Stratified squamous Epithelium
Serosa or Adventitia
Adventitia (without peritoneum)
Oral cavity
Wall : Lip, Cheek & Plate
Internal structures : Tongue, Teeth, Gum & Duct of salivary glands
Stratified Squamous Epithelium
Keratinized
Lamina propria has several papillae & res directly on bony tissue
Protect oral mucosa from damage during mastication function
Gum & hard palate
non-keratinized
Covers soft palate, lip, cheek & floor of mouth
Lamina propria has papillae, similar to those in dermis of skin & continuous with submucosa containing diffuse small salivary gland
Tongue : Lingual Papillae
Fungiform papillae
mushroom shape
มี taste buds ใต้ต่อ epith.
Circumvallate papillae
dome shape มีล่องลึกชื่อ
trench
ด้านข้าง taste bud
Von Ebner’s gland : serous gl. Below cleft
Filliform papillae
มีมากสุด
no taste buds
Foliate papillae
non-keratinized Stratified Squamous Epithelium
many taste buds อยู่ด้านข้าง
Tooth & Gum
Tooth
Neck: ต่อระหว่าง crown-root
Root: ใน gum, dentin, cementum, periodontal membrane
Crown: พื้น ได้แก่ dentin(เนื้อฟัน), Enamel(สารเคลือบฟัน)
Pulp cavity(โครงในฟัน): nerve& blood vessel
Gum
Cover with keratinized stratified squamous epith.
long vascular papillae
Anus
Submucosa
Loose connective tissue with blood vessels, lymph follicles and the Meissner's plexus
Muscularis externa
Skeletal muscle 2 layer
Inner circular
Outer longitudinal
Mucosa
Non-keratinized stratified squamous epithelium
No gland
Serosa or Adventitia
Loose connective tissue
