The vermiform appendix is a narrow, tubular structure approximately 9 cm long that protrudes from the posteromedial wall of the cecum. It is attached to the cecum by a mesoappendix and its tip can point in various directions. The appendix has three parts - a base where it attaches to the cecum, a narrow tubular body, and a tip. It is supplied by the appendicular artery and drains lymphatically into superior mesenteric lymph nodes. Inflammation of the appendix is called appendicitis and removal of the inflamed appendix is known as an appendectomy.

1. VERMIFORM APPENDIX
DR.SUPRITI
DEMONSTRATOR(DEPT OF ANATOMY)
TMMC&RC

2. • It is a blind-ended muscular tube attached to the
posteromedial wall of caecum, about 2cm below ileocaecal jxn.
• Suspended by peritoneal fold, MESOAPPENDIX.
• Devoid of taenia coli, sacculations, appendices epiploicae.

4. MESOAPPENDIX
• The mesoappendix (mesentery of appendix) is short, triangular
and variable.
• It extends the whole length of appendix.The breadth of
mesoappendix usually falls short of length of appendix.
• The body of appendix is kinked on itself where the free border
of mesoappendix ends,hence it is coiled like worm and is
named the vermiform.
• Appendicular vessels pass through free margin of
mesoappendix.

6. MEASUREMENTS
• The appendix is 9 cm (7 to 11cm) in length but can range from
2 to 20 cm. The diameter of the appendix is 1 to 7 mm.
• It is relatively longer in children and decreases after 40 years of
age.

7. SURFACE ANATOMY
• The base of appendix is represented by a point about 2cm
below the intersection between the transtubercular and rt
lateral planes.

8. McBurney’s point
• Represented by a point at the junction of medial two third and
lateral one third of a line which extends from the umblicus to
rt ant. Sup.illiac spine.
• This point indicate maximum tenderness in a patient suffering
from inflammation of the appendix.

10. PARTS OF APPENDIX
 A) Base
 B) Body
 c) Tip

11. BASE
 Base – it is attached to posteromedial wall of caecum
about 2 m below the ileocaecal junction.
 All taenia of caecum converge to the base and serve
as a guide for the identification of the appendix.

13. BODY
 Body is narrow,tubular and contains a canal which
opens into the caecum.
 The caecal opening is guarded by an incomplete
mucous fold called as,”THE VALVE OF GERLACH”

14. TIP
 It is least vascular and is directed in various direction.

15. TYPES
 A) Retro-caecal: 12’o clock (65%)
 B) Splenic: 2’o clock (1-2%)
Preileal (Dangerous) & Postileal
 C) Promontoric: 3’o clock , towards sacrum
 D) Pelvic: 4’o clock (30%), downwards & medially (rt
uterine tube & ovary)
 E) MID-INGUINAL: 6’o clock Vertically downwards.
 F)PARACOLIC:11o’clock,appendix pass upwards or
towards right.

17. BLOOD SUPPLY
 Appendicular A br. Of inferior div of ileocolic art
 Recurrent br supplies base of appendix and anastomose
with posterior caecal artery.
 End artery

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19. NERVE SUPPLY
 Parasympathetic: VAGUS
 Sympathetic: T10 segment of spinal cord.

20. LYMPHATIC DRAINAGE
Lymphatics drain into superior mesenteric lymph
nodes via ilea-colic nodes

21. APPLIED ANATOMY
 Inflammation of appendix is known as
appendicitis,seen in adoloscent age.In this condition
it is usually necessary to remove the appendix.
 The operation for removal of appendix is called as
appendectomy.

22.  The anatomial factors producing inflammation may
be as follows:-
 Appendix is a blind tube,a faecolith may obstruct the
lumen and precipitate the attack of appendicitis.
 Supplied by an end artery.
 Presence of hiatus muscularis.
 Presence of lymphatic follicles in submuosa.