LIFE SCIENCE

Detailed explanation-1: -Structures that have no apparent function and appear to be residual parts from a past ancestor are called vestigial structures. Examples of vestigial structures include the human appendix, the pelvic bone of a snake, and the wings of flightless birds.

Detailed explanation-2: -Examples of vestigial structures (also called degenerate, atrophied, or rudimentary organs) are the loss of functional wings in island-dwelling birds; the human vomeronasal organ; and the hindlimbs of the snake and whale.

Detailed explanation-3: -Appendix. The appendix is perhaps the most widely known vestigial organ in the human body of today. If you’ve never seen one, the appendix is a small, pouch-like tube of tissue that juts off the large intestine where the small and large intestines connect.

Detailed explanation-4: -However, some vestigial structures may persist due to limitations in development, such that complete loss of the structure could not occur without major alterations of the organism’s developmental pattern, and such alterations would likely produce numerous negative side-effects.

Detailed explanation-5: -Sinuses. Human cheekbones hold the maxillary sinuses. Appendix. It is one of the most commonly known vestigial organs. Coccyx. Wisdom Tooth. External Ear. Nictitating Membrane. Tonsils. More to Explore: