Here's a breakdown:
* Vestigial: Means "remaining in a reduced or degenerate condition."
* Structures: Refers to anatomical features.
Examples of vestigial structures in humans include:
* Appendix: A small, finger-like projection from the large intestine that likely served a purpose in our herbivorous ancestors.
* Wisdom teeth: These molars were once helpful for grinding tough foods, but they often cause problems in modern humans.
* Tailbone (coccyx): A remnant of the tail found in our primate ancestors.
* Goosebumps: Caused by tiny muscles that once helped our hairy ancestors raise their fur for warmth or intimidation.
These structures provide evidence of evolution and the shared ancestry of different species.
