Скачать с ютуб Small Intestine Anatomy (Parts, Topography, Structures, Layers) в хорошем качестве

Small Intestine Anatomy (Parts, Topography, Structures, Layers)

Content: Introduction 0:00 Small Intestine Overview: 00:40 Duodenum: 01:14 Jejunum and Ileum: 03:39 Anatomical Structures of the Duodenum: 6:48 Anatomical Structures of Jejunum and Ileum: 9:35 Layers of the Small Intestinal Wall: 10:25 ------------------------------- 💎Channel membership:    / @taimtalksmed   📷 Follow my IG:   / taimtalksmed   💝 Donation link: https://www.buymeacoffee.com/taimtalk... ------------------------------- Small Intestine Overview: - Small Intestine goes from the Pylorus to the Caecum - Approx 7 meters long in adults - Parts of the small intestine: Duodenum, Jejunum, Ileum Duodenum: - 20-30cm - Responsible for Iron Absorbtion, Chemical Digestion, Chemical Neutralization - Processes Chyme from the stomach Topography of the Duodenum: - Skeletopy: From L1 to L3 - Syntopy: ○ Behind Duodenum: Inferior Vena Cava, Aorta, Right Kidney ○ Above Duodenum: Liver, Pancreas ○ Anteriorly: Transverse Colon - Holotopy: Epigastric Region and Umbilical Region Jejunum and Ileum: - No strict demarcation between jejunum and ileum - Jejunum (2-3 meters long) ○ Primary Function: Absorbtion - Ileum (2-4 meters long) ○ Absorbs remaining nutrients and vitamins (vitamin b12) Topography of the Jejunum and Ileum: - Skeletopy: L2 to Right Iliac Fossa - Syntopy: ○ Surrounded by Caecum, Ascending colon, transverse colon, descending colon and sigmoid colon ○ Posteriorly: Fixated to posterior abdominal wall through the root of the mesentery (Radix Mesenterii) ○ Anteriorly: Greater Omentum - Holotopy: ○ Ileum: Umbilical and left lateral region ○ Jejunum: Left Lateral Region, Right Inguinal Region, Pubic Region Anatomical Structures: - Duodenum: ○ Superior Part § from Pyloric Orifice (Ostium Pyloricum) § To Superior Duodenal Flexure (Flexura Duodeni Superior) ○ Descending Part § From Superior Duodenal Flexure (Flexura Duodeni Superior) § To Inferior Duodenal Flexure (Flexura Duodeni Inferior) ○ Inferior Horizontal Part § From Inferior Duodenal Flexure (Flexura Duodeni Inferior) ○ Ascending Part § Until Duodenojejunal Flexure (Flexura Duodenojejunalis) / Ligament of Treitz - Jejunum: ○ Wider, Thicker than Ileum ○ More vascular ○ Darker in colour - Ileum: ○ Thinner ○ Less Vascular ○ Lighter in Colour Layers of the Small Intestinal Wall: - Tunica Mucosa ○ Made up of Simple Columnar Epithelium ○ Circular Folds (Plicae Circulare) absent in the duodenal bulb (bulbus duodeni) ○ Intestinal Villi (Villi Intestinales) ○ Microvilli ○ Intestinal Glands (Glandula Intestinales) ○ Solitary Lymphoid Nodules (Noduli Lymphoidei Solitarii) ○ Aggregated lymph nodules (Noduli Lymphoidei Aggregati) ○ AT the duodenum: § Major Duodenal Papilla (Papilla Duodeni Major) § Minor Duodenal Papilla (Papilla Duodeni Minor) - Tela Submucosa ○ Duodenum: Brunners Glands ○ Jejunum: Longer Villi ○ Ileum: More goblet cells in mucosa and has Peyers Patches (GALT) - Tunica Muscularis ○ Provides Peristaltic movement (peristalsis) ○ Inner Layer: Circular Muscle Layer § Hepatopancreatic Sphincter (Sphincter of Oddi) (M. Sphincter Ampullae Hepatopancreatica) ○ Outer Layer: Longitudinal Muscle Layer - Tunica Serosa ○ Intraperitoneal Organs (Peritoneum) ○ Retroperitoneal Organs (Duodenum) has tunica adventitia at some parts Sources used in this video: - Memorix Anatomy 2nd Edition by Hudák Radovan (Author), Kachlík David (Author), Volný Ondřej (Author) - Biorender - University notes and lectures