APPENDIX

4 vermiform appendix
- 4.1 dimensions
  - 4.1.1 2 to 20 cm
- 4.2 positions
  - 4.2.1 lies in right iliac fossa
  - 4.2.2 hour hand of clock
    - retrocolic - 12
    - preileal - 2 0 clock
    - post ileal 2 o clock
    - promonteric - 3 o clock
    - pelvic 4 o clock
    - midinguinal 6 o clock
    - paracolic 11 o clock
- 4.3 appendicular orifice
  - 4.3.1 posteromedial aspect pf caecum
  - 4.3.2 guarded by valve of gerlach
  - 4.3.3 marked by a point 2cm below junctn of transtubercular and right lateral plane
  - 4.3.4 MacBurney's point is of maximum tenderness in appendicitis
- 4.4 lumen of appendix
- 4.5 peritoneal relations
  - 4.5.1 mesoappendix or appendicular mesentery
- 4.6 blood supply
  - 4.6.1 appendicular artery
    - branch of lower division of ileocolic artery
    - runs behind terminal part of ileum
    - anastomose with posterior caecal artery
- 4.7 nerve supply
  - 4.7.1 sympathetic nerve t9 - t10 segments
    - through celiac plexus