What are the examples of vestigial organs?

1. The human appendix: The human appendix is a small, finger-shaped organ that projects from the large intestine. It is not known to have any function in humans, and it is often removed during surgery for appendicitis.

2. Wisdom teeth: Wisdom teeth are the last teeth to erupt in humans, and they often do not come in until the late teens or early twenties. They are often impacted, meaning that they do not erupt properly, and they can cause pain and other problems. Wisdom teeth are often extracted to prevent these problems.

3. The tailbone: The tailbone is a small bone at the bottom of the spine. It is a remnant of the tail that humans had in their evolutionary ancestors. The tailbone does not have any function in humans, and it can be removed without any negative consequences.

4. The ear muscles: Humans have three small muscles in the ear that are not used for anything. These muscles are thought to be remnants of the muscles that humans used to move their ears in their evolutionary ancestors.

5. Body hair: Humans are born with a layer of body hair, which is shed shortly after birth. However, some people continue to have body hair, especially on their arms, legs, and underarms. Body hair is not necessary for survival, and it is thought to be a vestigial organ.

6. The plica semilunaris: The plica semilunaris is a small fold of skin in the inner corner of the eye. It is thought to be a remnant of the nictitating membrane, which is a third eyelid that is found in many animals. The nictitating membrane helps to protect the eye from dust and other irritants.

7. The Darwin's tubercle: The Darwin's tubercle is a small bump on the upper ear rim. It is thought to be a remnant of the pointed ears that were found in our evolutionary ancestors.

8. The palmaris longus muscle: The palmaris longus muscle is a thin muscle that runs from the elbow to the wrist. It is not necessary for any major movements of the hand, and it is often absent in some people.

9. The plantaris muscle: The plantaris muscle is a small muscle that runs from the knee to the heel. It is not necessary for walking or running, and it is often absent in some people.