The organ corresponding to the sign is the mid section of the digestive system. As it happens, a tremendous amount of Virgos suffer from food allergies, ulcers or even sometimes colitis, just because of the internal worry and torture they endure in looking for perfection. A great proportion of Virgos are OCD, or have some kind of obsessiveness.
For the record, The Virgo population also includes a great number of hypochondriacs. They are very supplements oriented, and extremely picky eaters.
A big percentage of surgeons are Virgos, thank God, because they know how to cut!
The greatest thing about Virgos is their sense of care: (mother Theresa was a Virgo). They are super responsible and make great assistants: their offices are full of to do lists, they come the first and leave the last. Extremely reliable and professional with everything they touch, they tend to be workaholics. Virgos are not too good at risk taking, but will prefer the security of a steady job (ex: accountings). Some of them are also found in PR and are really talented and sharp.
The famous (funny) Virgo test:
If we want to know who's a Virgo in the room: We start teaching in front of a picture that is purposely made not straight, after 2 minutes the Virgos are going to get agitated, and instead of concentrating on the class, they will look at the crooked picture until one will finally get up and straighten it up (to the relief of all the others).
I personally tried that test with success!