Question

Why do humans have an appendix even though it is unnecessary?

Answer 1

It is necessary

The appendix has been found to play a role in mammalian mucosal immune function.

Step-by-step explanation:

• It is believed to be involved in extrathymically derived T-lymphocytes and B-lymphocyte-mediated immune responses.
• It is also said to produce early defences that help prevent serious infections in humans.

But humans can live without appendix

Answer 2

scientists believe that the appendix may have been useful in the past for digestion, as it contains immune tissue that helps fight infection. It may have also served as a reservoir for beneficial gut bacteria. However, as humans evolved and their diets changed, the appendix became less important and eventually became vestigial, meaning it no longer serves a necessary function.