Large Intestines

Question 1

Divisions of the Large Intestines

Answer 1

Cecum
Appendix
Colon - ascending, transverse, descending, sigmoid
Rectum
Anal Canal

Question 2

Wormlike blind intestinal diverticulum w/ short triangular mesentery – MESOAPPENDIX

3-5 inches (6-10 cms)

Answer 2

APPENDIX

Question 3

Blood supply and Venous Drainage of Appendix

Answer 3

ileocolic artery – APPENDICULAR ARTERY

APPENDICULAR VEIN – posterior cecal vein – SMV

Question 4

MC location of appendix

Answer 4

retrocecal - 64%

pelvic - 32%

Question 5

15 inches, longest, largest and most mobile part of the colon

occupies the UMBILICAL region crosses from R COLIC FLEXURE below the right lobe of the liver and hands downward and ascends to the L COLIC/SPLENIC FLEXURE

Answer 5

TRANSVERSE COLON

Question 6

Blood supply and Venous Drainage of Transverse Colon

Answer 6

SMA – MIDDLE COLIC ARTERY and RIGHT COLIC

IMA – LEFT COLIC ARTERY

superior and mesenteric vein

Question 7

Passes superiorly on the R side from cecum to
the R lobe of liver where it turns to the L at R
colic / hepatic flexure

5 inches/ 13 cms long

Answer 7

Ascending Colon

Question 8

Blood supply and Venous Drainage of Ascending Colon

Answer 8

SMA – ILEOCOLIC and RIGHT COLIC ARTERY

ILEOCOLIC and RIGHT COLIC VEIN – SMV

Question 9

10 inches (25 cms ) long

passes retroperitoneally from the L colic flexure into the L iliac fossa where it
continuous with sigmoid colon

Answer 9

DESCENDING COLON

Question 10

Blood supply and Venous Drainage of Descending Colon

Answer 10

IMA – LEFT COLIC ARTERY AND SIGMOID ARTERY

IMV

Question 11

S – shaped loop

10 – 15 inches (25-38 cms ) long

extends from the iliac fossa to the 3rd SACRAL VERTEBRA – rectum

with fan shaped sigmoid mesocolon

Answer 11

SIGMOID COLON

Question 12

Relations of Sigmoid colon to other structures

Answer 12

ANTERIOR
males – UB
females – uterus & vagina

POSTERIOR
rectum & sacrum

Question 13

Blood supply and Venous Drainage of Sigmoid Colon

Answer 13

IMA – SIGMOID ARTERY

IMV