What is the appendix?

The appendix is called the vermiform appendix. Gray's Anatomy (1918) describes it as a narrow, worm-shaped tube.

What it is

  • A narrow, worm-shaped tube.
  • About 8-10 cm long in the adult.
  • Its function in humans is uncertain; it contains lymphoid tissue.

Where it is

  • Attached to the lower end of the cecum.
  • In the lower right of the abdomen.
  • Its base is fairly constant; its tip can lie in several positions.

Source:

Last verified: 2026-07-18

  • Best Anatomy Answers is an educational reference about human anatomy. It is not medical advice — for any health concern, talk to a licensed medical professional.

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