vermiform appendix

This is worm like diverticulum arising from the posteriomedial wall, of the caecum about 2cm below the ileocaecal orifice .

THE DIMENSIONS :- the length various from 2 to 20 cm with the average of 9cm. vermiform appendix is longer in children and smaller in the adults. 

 

          POSITION :- appendix lies in the right illiac fossa . the based of appendix is fixed . the may pass upward and to the right .this is the paracolic or 11 o' clock position .

          LUMEN OF APPENDIX :-  its quite small and may be partially or completely obliterated after mid adult life.

RELATION OF APPENDIX : -  

1) PERITONIAL RELATIONS : - The appendix is suspended by a small , triangular fold of pritoneum,called the MESOAPPENDIX , OR APPENDICULAR MESENTERY. The fold passes upward behind the ileum , and is attached to the left layer of the mesentery

BLOOD SUPPLY OF VERMIFORM APPENDIX : - 

The appendicular artery is a branch of  lower division of the ileocolic artery. it runs behind the terminal parts of the ileum and enters the mesoappendix at a short distance from the base.

Blood supply of appendix is drained by the appendicular , ileocolic and superior mesentric vein to the portal vein.

NERVE SUPPLY ; - sympathetic nerve are derived from the thoracic nine and ten segments through the coelic plexus . parasympathetic nerves are derived from the vagus . 

☝ CLINICAL ANATOMY :- 

✒INFLAMMATION of appendix  

✒ appendicitis (pain)                      

✒McBurnery's point is the site of maximum tenderness in appendicitis.