Jejunum & Ileum & Large Intestine Flashcards Preview

Anatomy (TOPNOTCH SUPPLEMENT) > Jejunum & Ileum & Large Intestine > Flashcards

Flashcards in Jejunum & Ileum & Large Intestine Deck (15):
0

Proximal 2/5 , begins at the duodenojejunal flexure

Lies in the LUQ

Villi: Long finger-like

Intestinal glands (crypts): >3cm diameter

Circular folds: large, numerous palpable

Location: umbilical region, left side of abdomen

Vasa recta: long

Often empty, thicker walls, more vascular/redder than ileum

Jejunum

1

Distal 3/5, ends at the ileocecal junction

Lies in the RLQ

Villi: short, club-shaped

Intestinal glands (crypts): <3cm diameter

Circular folds: small, few, disappear distally

Location: hypogastric & inguinal region, right side

Vasa recta: short

Prominent Peyer patches, Vitamin B12 absorption

Ileum

2

6-7 meters long

Jejunum & Ileum

3

Blood supply of JEJUNUM & ILEUM

SUPERIOR MESENTERIC ARTERY from the abdominal aorta at level L1, sending 15-18 branches which unite to form loops
ARTERIALARCADES that gives rise to VASA RECTA

4

What anatomic features permits the surgeons to distinguish the ileum from other parts of the small intestine?

It has more fat in its mesentery than the jejunum

5

Characteristic of JEJUNUM

Deeper red

2-4cm

Thick and heavy

Greater vascularity

Long vasa recta

Few, large arcades

Less fat

Large, tall plicaecircularis

Few lymphoid nodules

6

Characteristic of ILEUM

Paler pink

2-3cm

Thin and light

Less vascularity

Short vasa recta

Many arcades

More fat

Low, sparse-absent in distal

Many lymphoid nodules

7

Part of the small intestine invaginates into an adjacent distal segment (intussuscipiens)

May be jejunoileal, ileoileal or most commonly, ileocecal

More common in children; may be caused by hyperplasia of lymphatic tissue in the wall of ileum

Obstructed bowel, right sided colicky pain, abdominal distention and hematochezia

Intussusception

8

Villi: none

Intestinal glands (crypts): 6-9cm diameter

Circular folds: none

Colon

9

Taenia coli
- 3 longitudinal bands of smooth muscle

Appendices epiploicae
- fatty tags

Haustra
- sacculations of the wall separated by plicae semilunaris

Large intestine

10

Hypersensitivity to gluten & gliadin protein (wheat, other grains) --> lymphocytes, plasma cells macrophages, eosinophils in lamina propria

Anti-gliadin antibodies in blood

SSX: chronic diarrhea, flatulence, weight loss, fatigue

Celiac disease

11

Chronic granulomatous inflammatory bowel disease --> linear, serpentine ulcers with skip areas

MC site: ileum

SSX: RLQ mass, diarrhea, refer, weight loss, weakness

Complications: strictures, fistulas

Crohn's disease

12

Appendix is intraperitoneal, suspended by mesoappendix

McBurney point: midpoint of the line from R anterior superior iliac spine (ASIS) to umbilicus

Appendicitis

13

Dilatation of transverse colon --> perforation

SSX: abdominal pain, fever, leukocytosis

Toxic megacolon

14

Dilatation of cecum

Often in critically ill, bed ridden patients

Ogilvie syndrome