> The human appendix is rich in special cells known as M cells. These act as scouts, detecting and capturing invasive bacteria and viruses and presenting them to the body's defense team, such as the T lymphocytes.
> Some studies suggest that as ancient humans were predominantly herbivorous, they used their appendixes for digestion. However, as humans evolved, they started to include more easily digestible food in their diet and the appendix eventually lost its function.
> Appendicitis is inflammation of the appendix. Symptoms commonly include right lower abdominal pain, nausea, vomiting, and decreased appetite.
> Symptoms of appendicitis may include: Sudden pain that begins on the right side of the lower belly. Sudden pain that begins around the belly button and often shifts to the lower right belly. Pain that worsens with coughing, walking or making other jarring movements.