Anatomy of Small Intestine in Hindi Learn with Dr Shipra Disease on Tips

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small intestine- Pylorus to ileocecal junction, Length – 6m, Diameter- 2.5- 3 cm • Part- 3 1-Duodenum- 20-25cm, 2-Jejunum- 2/5th (2.5 m), 3-Ileum- 3/5th (3m) • Small Intestine Wall- • a- Serosa Coat- Peritoneum layer • b- Muscular Coat- Outer-long, inner- circular • c-Submucosa Coat- Connective tissue, venous plexus • d- Mucosa Coat- Villi present • Links 🔗- for NOTES AND any QUERY CONTACT.. • Instagram Id learnwithdrshipra https://www.instagram.com/learnwithdr... • Whatsapp channel- https://whatsapp.com/channel/0029VagP... • Telegram- https://t.me/learnwithdrshipra • 1- Duodenum- C-shaped, 20-25 cm long • Duodenal gland(Brunner's gland)- Produce mucous rich alkaline secretion containing bicarbonate. • Receives bile juice Pancreatic juice through the Pancreatic Duct, controlled by the sphincter of Oddi. • Arterial supply- • Superior Pancreaticoduodenal artery, Inferior Pancreaticoduodenal artery • Venous Drainage- • Sup. Mesenteric vein, Portal vein, Splenic vein, Pancreaticoduodenal vein • 2. Jejunum- 2.5 m long, Plicae Villi present- increase its surface area • Work- product of digestion (Sugar, Amino acids fatty acid) are absorbed into blood stream here • 3. ileum- 3m length, Absorb mainly vit B12 bile acid. • Mesentery- Broad fan shaped fold of peritoneum suspends jejunum ileum from post abdominal wall convey nutrition innervation • Blood supply- ileum jejunum • Arterial Supply- Superior mesenteric artery, ileocolic artery • Venous Drainage- Superior mesenteric vein, ileocolic vein • Intestinal Gland- Secrete- Digestive enzyme mucus • Simple Tubular glands- Present in Mucous mem. of the jejunum ileum. Open b/w villi. • cell types- • 1- Enterocytes cells- Absorptive • 2- Goblet cells- secret mucus • 3- Entero-endocrine cells- secret hormone CCK • 4- Paneth cells- secret lysozyme, tumour necrosis factor • Functions of SI- • Peristalsis- increased by parasympathetic stimulations. • Secretion of intestinal juice- increased by PSS. • Secretion of hormone CCK Secretin. • Absorption of nutrients. • Completion of chemical digestion of carbohydrate, protein, fat in the enterocytes of the villi. • Protection against infection of microbes. • Copyright Disclaimer under section 107 of the Copyright Act of 1976, allowance is made for “fair use” for purposes such as criticism, comment, news reporting, teaching, scholarship, education and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational or personal use tips the balance in favour of fair use.

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