Humans Vestigial facts

While investigating facts about Humans Vestigial, I found out little known, but curios details like:

The appendix may not just be vestigial in humans; a 2007 study suggested that appendices serve as safe havens for "good bacteria" when illness flushes other bacteria from the intestines. Afterward, the useful bacteria can quickly repopulate the intestines.

The human appendix is no longer considered a vestigial (useless) organ. It plays an important role in your immune and lymphatic systems.

In my opinion, it is useful to put together a list of the most interesting details from trusted sources that I've come across. Here are 11 of the best facts about Humans Vestigial I managed to collect.

1. Human Vestigiality (traits that lost function via evolution) includes: appendix, tailbone, wisdom teeth, a devolved third eyelid, extra nipples (and male nipples), noncoding DNA, palmar grasp reflex (how baby primates cling to their mother), hiccups, goose bumps, and several reproductive traits

2. There are a number of other vestigial traits in the human body other than the appendix, like muscles in our ears, wisdom teeth, tonsils, a stump of a third eyelid and our coccyx (former tail).

3. About 85% of humans have a vestigial muscle called the Palmaris Longus muscle, which can be seen by touching the pads of the fourth finger and thumb and flexing the wrist. The tendon of the muscle, if present, will be visible in the midline of the anterior wrist.

4. Birds have magnetic material in their sinuses to detect Earth's magnetic field; Humans have a vestigial remnant of this material

5. White bumps on the human penis' glans called Pearly penile papules, that may be the vestigial remnants of penis spines.

6. The Plica Semilunaris, the vestigial remains of a nictitating membrane, or third eyelid, in humans once used to protect our eyes.

7. Humans are sometimes born with a vestigial tail as long as 13 cm

8. 84-91% of humans have a vestigial muscle in their wrist called the palmaris longus.

9. The human appendix might not be vestigial after all.