Ques. 1AIPMT 2000
Which is not a vestigial organ in man?
- Segmental muscles of abdomen
- Third molar
- Coccyx
- Nails
Answer
(4) Nails
Solution
Vestigial organs are reduced, functionless remnants of organs that were functional in ancestors.
In man, segmental muscles of the abdomen, third molars (wisdom teeth) and the coccyx (tail vertebrae) are vestigial organs.
Nails are functional structures (protect the tips of fingers and toes) ⇒ not vestigial.
Answer: (4)