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66 Cards in this Set

  • Front
  • Back

Extent of the small intestine

From the pylorus of the stomach to the ileocecal junction

The small intestine is divided into

Duodenum, jejunum and ileum

Average length of small intestine in adult male and female



Diameter of small intestine

2.5-3 cm

Difference BTW small intestine and large intestine

Absence of tenia coli, haustrations and appendices epiploic

Variation of small intestine

of small intestine

small intestine

4.6 - 9.8 m

Most fixed part of the small intestine is


Shortest and widest part of small intestine


Extent of duodenum

Pyloric end of stomach to duodenojejunal flexure

Length and shape of duodenum

C- shaped and 25 cm

The duodenum is composed of how many part


Length of the superior part of duodenum

5cm long

Length of descending part

7.5 cm

Length of horizontal part

10 cm

Length of ascending part


Relation of superior part of duodenum

Anterolateral to the body of L1 vertebrae

The most common site of duodenal ulcer

Superior part of duodenum

Ligament connecting duodenum to liver is called

Hepatoduodenal ligament

Duodenum lies retro peritoneal except at

The two ends of the duodenum

Peritoneal Relations of the superior part of duodenum

Peritoneal relations

1.Proximal 2.5 cm is movable, it is attached to the lesser omentum above and to the greater omentum below

2. Distal 2.5cm is fixed and retro peritoneal and covered with peritoneum anteriorly only

Visceral relations of superior part of duodenum

Visceral relations1. Anteriorly: quadrate lobe of liver and gall bladder2. Posteriorly: gastroduodenal artery, bile duct, portal vein and inferior vena cava3. Superiorly: epiploic foramen4. Inferiorly: head and neck of pancreas

Relation of the descending part of duodenum

Along the right side of L1-L3 vertebrae

Most fixed part of duodenum

Descending part of duodenum

Extent of the descending part of duodenum

Superior duodenal flexure to inferior duodenal flexure

Extent of horizontal part of duodenum

Inferior duodenal flexure to anterior of abdominal aorta

Anterior relation of the horizontal part of duodenum

Superior mesenteric vessel

Shortest part of duodenum

Ascending part of duodenum

Extent of ascending part of duodenum

In front of duodenum to duodenojejunal flexure

What is another name for suspensory muscle of ascending

Ligament of Treitz

What is the ligament of Treitz?

It is a fiber of muscular band that extends from the Rights crus of diaphragm behind the pancreas to the duodeno jejunal flexure

Reason for suspensory muscle of duodenum

Contraction of this muscle widens the angle of the flexure and aids movement of intestinal contents into the jejunum.

Most distinguishing feature of duodenum

Brunner/ duodenal gland

What is a mesentery

Double layer of peritoneum

Is Jejunum and ileum a retro peritoneal or intraperitoneal organ


What marks the division BTW duodenum and jejunum

Suspensory muscle of duodenum

Length of jejunum

2.5 m long

Characteristic of jejunum

Plicae circulated and leaf like villi which increases surface area

Function of ileocecal valve

Prevent reflux of material from cacum to ileum

Length of ileum


Longest section of small intestine


Characteristic of ileum

Fewer villi which are short and broad tipped (club like), relatively abundant goblet cells, absorbs mainly vitamin B12 and bile acid

Blood supply of small intestine

Proximal to major duodenal papilla - gastroduodenal artery branch of coeliac trunk

Distal to major duodenal papilla- inferior pancreaticoduodenal artery(SMA)

Extent of the large intestine

Ileocecal junction to anal orifice

Length of large intestine

1.5 meters

Features of large intestine

Taenia coli, haustrations, appendices epiploicae

Length of appendix

6-10 cm

Description of appendix

Blind end intestinal diverticulum that contain mass of lymphoid tissue, 5 mm in diameter, narrowest part of GI tract, longer in children than adult

Description of appendix

Blind end intestinal diverticulum that contain mass of lymphoid tissue, 5 mm in diameter, narrowest part of GI tract, longer in children than adult

Surface marking of appendix

Mc Burney's point

Describe Mc Burney's point

Lateral 1/3 and medial 2/3 of line joining the ASIS and umbilicus

Position of appendix

Right iliac fossa with the base fixed to caecum and tip pointing in different direction

Position of appendix

Retrocecal(12'0 clock) position: commonest

Splenic( 2'0 clock) position: could be preileal or post ileal

Horizontal (3'0 clock) towards sacral promontory

Pelvic (4'0clock) may lie close to right ovary or fallopian tube

Subcaecal/ inguinal ( 6'0 clock)

Para colic(11'0 clock) by the side of ascending colon

Why is appendix called abdominal tonsil

It contains excessive lymphoid tissue around the lumen

Mesentery of appendix is called


Blood supply of appendix

Appendicular artery ( branch of ileocolic artery)- end artery

Appendicular, ileocolic and superior mesenteric vein

Innervation of appendix

Sympathetic is via T9 and T10 through coeliac plexus

Parasympathetic is via vagus nerve

Longest part of large intestine is

Transverse colon

Length of ascending colon

12-20 cm

Length of transverse colon

40-50 cm

Arterial supply of large intestine

Marginal anastomosis of Drummond which is formed by branches of SMA and IMA

What portion of large intestine does SMA supply

Caecum, ascending colon and proximal 2/3 of transverse colon by ileocolic, right colic and middle colic

What part of large intestine does IMA supply

Distal 1/3 of transverse colon, descending colon, sigmoid Colon by left colic and sigmoid artery and superior rectal which supply rectum

Sympathetic Innervation of large intestine

Sympathetic nerve of midgut arises from coeliac and superior mesenteric ganglia distributed along SMA

Hind gut is via lumbar part of sympathetic trunk around IMA

Parasympathetic innervation of large intestine

Midgut- vagus

Hind gut- pelvic splanchnic nerve

Auerbach plexus is found


Myenteric plexus is found

BTW circular and longitudinal muscular coat