The stomach is a J-shaped muscular organ that occupies the upper left and mid abdominal regions. It has two openings, the cardiac and pyloric ends, as well as two curvatures and surfaces. Internally, it contains mucous, parietal, and chief cells that secrete enzymes and acids to break down food. The stomach receives blood supply from the celiac trunk and hepatic and splenic arteries, and drains into the portal vein system. It is innervated by both the sympathetic and parasympathetic nervous systems.

1. ANATOMY OF STOMACH

2. DEVELOPMENT

3. • Stomach is a muscular
bag-most distensible part
of the digestive tract.
• Occupies
epigastric,umbilical & left
hypochondrium regions.
• J-shaped to pyriform.
• 25cm long,1.5-2litres.

4. EXTERNAL FEATURES
• Two orifices : Cardiac and Pyloric
• Two curvatures : Greater and Lesser
• Two surfaces : Anterosuperior and Posteroinferior
• Two parts : Cardia – Fundus and Body
:Pyloric – Antrum and Canal

6. RELATIONS OF THE STOMACH
• Peritoneal Relations

7. • Visceral relations

8. INTERIOR OF THE STOMACH

9. HISTOLOGY
• Mucous cells
• Parietal cells
• Chief cells
• Endocrine cells
• Submucosa-strongest collagen rich layer
• Pyloric sphincter-circumferential layer of smooth muscle

11. BLOOD SUPPLY

12. VENOUS DRAINAGE
• Right & Left gastric veins-Portal vein
• Right gastroepiploic vein-superior mesenteric vein
• Left gastroepiploic & Short gastric veins-Splenic vein

13. LYMPHATIC DRAINAGE

14. NERVE SUPPLY
• Intrinsic
• Sympathetic
• Parasympathetic

16. REFERENCES
• SRB’s Manual of Surgery,4th edition.
• B. D. Chaurasia’s Human Anatomy,Vol.2,5th edition.

17. THANK YOU !