Анатомия тонкого кишечника (Части, Топография, Структуры, Слои) скачать в хорошем качестве

Анатомия тонкого кишечника (Части, Топография, Структуры, Слои)

Content: 0:00 Introduction 0:40 Small Intestine Overview 1:14 Duodenum 3:39 Jejunum and Ileum 6:48 Anatomical Structures of the Duodenum 9:35 Anatomical Structures of Jejunum and Ileum 10:25 Layers of the Small Intestinal Wall ------------------------------- 🫀 Join:    / @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