Small Intestine Mesentery

Question 1

Small intestine mesentery

Answer 1

1. Fan shaped peritoneal fold
2. Extend from peritoneum covering small intestine to posterior abdominal wall

Question 2

Borders

Answer 2

1. Free border
2. Attached border (root)

Question 3

Free border

Answer 3

1. 6 meters long
2. Contains jejunum and ileum coils

Question 4

Attached border

Answer 4

1. 6 inches long
2. Extend obliquely downwards and to right from duodenal flexure to ileocaecal junction
3. Cross over from above downwards:
   - Duodenum 4th part
   - Abdominal aorta
   - IVC
   - Right Psoas major
   - Right genitofemoral nerve
   - Right gonadal artery
   - Right ureter
4. Mesentery central part is the longest part about 20 cm when measured from its root to its intestinal border

Question 5

Contents

Answer 5

1. Small intestinal loops
2. Superior mesenteric vessels
3. Lymph vessels (lacteals)
4. Mesenteric lymph nodes
5. Sympathetic and parasympathetic plexuses
6. Extra peritoneal CT and fat

Question 6

Small intestine loops

Answer 6

In mesentery free border

Question 7

Superior mesenteric vessels

Answer 7

In mesentery root, their ileal and Jejunal branches run in between mesentery both layers

Question 8

Lymph vessels (lacteals)

Answer 8

Carry lymph milky in appearance (chyle)

Question 9

Mesenteric lymph nodes

Answer 9

100-150 nodes in 3 rows:
1. Small sized
2. Medium sized
3. Large sized

Question 10

Small sized nodes

Answer 10

Near intestine

Question 11

Medium sized nodes

Answer 11

Midway between free and attached borders

Question 12

Large sized nodes

Answer 12

Along superior mesenteric vessels