Jejunum And Ileum

Question 1

Beginning

Answer 1

Duodenojejunal flexure

Question 2

End

Answer 2

Ileocaecal junction

Question 3

Length

Answer 3

6 meters (20 feet) long

Question 4

Site

Answer 4

Arranged as loops or coils completely covered by peritoneum and found in free border of small intestine mesentery

Question 5

Jejunum

Answer 5

1. Proximal 2/5 of small intestine mobile part
2. Its junction with duodenum is duodenojejunal flexure which is fixed by ligament of Treitz

Question 6

Jejunum: length

Answer 6

8 feet (2.4 meters) long, usually empty

Question 7

Jejunum: site

Answer 7

Tends to lie in umbilical region

Question 8

Jejunum: structure

Answer 8

1. Thick wall (thick mucosa and musculosa)
2. Wide lumen (due to active peristalsis and absorption)

Question 9

Jejunum: operation

Answer 9

Felt as double layer

Question 10

Jejunum: vascularity

Answer 10

More vascularity and right red

Question 11

Jejunum: mucosal folds

Answer 11

1. Numerous circular mucosal folds
2. Papillae are longer and less numerous

Question 12

Jejunum: lymphatic drainage

Answer 12

1. Poor in lymph vessels and nodes
2. No Peyer’s patches

Question 13

Jejunum: supply

Answer 13

1. Jejunal arteries form simple arterial arcades (1 or 2) in mesentery
2. Small amount of fat in mesentery
3. Vessels appear clear in mesentery (windows)

Question 14

Ileum

Answer 14

1. Distal 3/5 of small intestine mobile part
2. Ends at ileocaecal junction at meeting of right lateral vertical plane with intertubercular plane

Question 15

Ileum: length

Answer 15

12 feet (3.6 meters) long, usually contains food

Question 16

Ileum: site

Answer 16

Tends to lie in hypogastrum and right iliac fossa

Question 17

Ileum: structure

Answer 17

1. Thin wall (thin mucosa and musculosa)
2. Narrow lumen (due to less active peristalsis and absorption)

Question 18

Ileum: at operation

Answer 18

Felt as one layer

Question 19

Ileum: vascularity

Answer 19

Less vascularity and pale red

Question 20

Ileum: mucosal folds

Answer 20

1. Few circular mucosal folds
2. Papillae are shorter and more numerous

Question 21

Ileum: lymphatic drainage

Answer 21

1. Rich in lymph vessels and nodes
2. Many Peyer’s patches

Question 22

Ileum: supply

Answer 22

1. Ileal arteries form complicated arterial arcades (3 or 4) in mesentery
2. Large amount of fat in mesentery
3. Vessels are not clear in mesentery (no windows)

Question 23

Arterial supply

Answer 23

1. Jejunal and ileal branches of superior mesenteric artery

Question 24

Venous drainage

Answer 24

1. Superior mesenteric vein (portal circulation)

Question 25

Lymphatic drainage

Answer 25

Mesenteric nodes