What body parts of human being that has no function at all?

Answer 1

The brain in many cases . . .

Most likely, every body part has a use. That we haven't discovered its use doesn't mean that it is useless.

One example is the vermiform appendix in the large intestine. Doctors historically slice them out and joyously toss them in the trash, because 'What use are they, anyway?'

Turns out that they recently found out that the appendix serves to hold several types of good bacteria. If a person gets a bad case of long-lasting diarrhoea, then the good bacteria may be completely washed out of the intestines. Enter the appendix, which dumps its little load of good bacteria into the gut, thus renewing the healthful bacteria population there, and helping to keep its owner alive.

Answer 2

The human body has several vestigial structures with little to no function, including the appendix, ear muscles that control movement of the ear, and the tailbone (coccyx). These structures are remnants from our evolutionary past and have lost their original purpose.

Answer 3

i think your tonsils and apendix

Answer 4

Appendix and male nipples.