Small Intestine
1. Length:
- 15-18 feet is the length of the entire small intestine in an adult.
2. Segments:
- Longest aspect of the small intestine:
- Ileum
- Smallest in diameter:
- Ileum
- Part with a "feathery" and "coiled spring" appearance when filled with barium:
- Jejunum
Large Intestine
1. Sections Not Considered Part of the Colon:
- Cecum and Rectum
2. Appendix:
- Correct term for appendix:
- Vermiform appendix
Anatomy and Physiology
1. Rectum Curves:
- True: The rectum possesses two anteroposterior curves that impact rectal enema tip insertions.
2. False Statement:
- False: In the large intestine, sacculations are called haustra; they are not present in the jejunum.
, 3. Colic Flexure:
- Left colic (splenic) flexure is located 1-2 inches higher or more superior in the abdomen.
4. Suspensory Ligament of the Duodenum:
- The band of muscle tissue at the junction of the duodenum and jejunum.
5. Intraperitoneal Structure:
- Transverse colon is intraperitoneal.
6. Absorption Location:
- Large intestine is where reabsorption of inorganic salts occurs in the GI tract.
Digestive Movements and Conditions
1. Digestive Movement in Small Intestine:
- Rhythmic segmentation occurs in the small intestine.
2. Common Conditions:
- Meckel's diverticulum: Outpouching of the distal ileum.
- Diverticulosis: Condition of small herniations along the intestinal wall.
- Enteritis: Inflammation of the small intestine.
- Whipple's disease: Disorder of the proximal small intestine.
- Polyp: A new growth extending from the mucosal wall.
- Malabsorption syndrome: Inability to process certain nutrients.
- Diverticulitis: Inflammation of herniations in the intestinal wall.
3. Intestinal Twists and Telescoping:
- Volvulus: Twisting of the intestine on its own mesentery.
- Intussusception: Telescoping of the bowel into another segment.