I haven't got time to talk here right now and I'm also quite ill.

Bex I justed wanted to say that it sounds like you believe the word "vestigial" should mean "useless." If you look closely at what LinearAQ told you, you will see that vestigial parts are those which originally had a different function. Some appear to be useless, while others are vitally important to the organism in a new way -- like the examples you listed above.