It has a longitudinal muscle layer in the lamina muscularis
Explanation:
In this muscle layer the appendix houses an important number of lymphatic nodules. There is an orifice between the appendix and the cecum, when this orifice is obstructed due to scars, viscous mucus or fecal matter it might cause appendicitis that is an inflammation of the appendix. If the inflammation is untreated it may rupture leading to appendicitis.
