Final answer:
The appendix is located in the right lower quadrant (RLQ) of the abdomen, attached to the cecum of the large intestine. It may play a role in immunity and is dispensable, often removed if infected with appendicitis.
Step-by-step explanation:
The appendix is a small, worm-like structure attached to the cecum, which is the beginning of the large intestine located in the lower right quadrant of the abdomen. This area is typically referred to as the right lower quadrant (RLQ) when health care providers divide the abdominal cavity for diagnostic purposes. The function of the appendix has been debated, but it is known to contain lymphoid tissue and may play a minor role in immunity. Sometimes, the appendix can become infected in a condition known as appendicitis, which usually requires surgical removal of the appendix, known as an appendectomy. People who have had their appendix removed generally do not experience any negative long-term effects.