GIT index

Upper stores food Lower absorbs food

Symptoms too

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You're right in noting a distinction between upper and lower gastrointestinal (GI) tract conditions. Here's a clearer breakdown:

Upper GI Tract:

Includes: mouth, esophagus, stomach, and duodenum (first part of small intestine)

Diseases:

Oesophageal diseases: GERD, esophagitis, esophageal cancer

Peptic ulcer disease: Gastric and duodenal ulcers

Gastritis, hiatal hernia, esophageal varices

Lower GI Tract:

Includes: jejunum, ileum, colon, rectum, and anus

Functions: Absorption of nutrients (mostly small intestine) and water (colon)

Diseases:

Malabsorption syndromes: e.g., Celiac disease, lactose intolerance

Inflammatory bowel diseases (IBD): Crohn’s disease, ulcerative colitis

Irritable bowel syndrome (IBS)

Colorectal cancer

Absorption mainly occurs in the small intestine, especially the jejunum and ileum, which are part of the lower GI tract, as you correctly noted.

Would you like a simple diagram to visualize this distinction?