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Andy Resnick
Apr24-09, 08:03 AM
Sci Advisor
P: 5,539
Quote Quote by hypatia View Post
We have several areas of our bodies that the immune system appears to be incapable of function. These are called immune-privileged sites, and include the eye, brain, ovary and testis.
You can read more about it here. -
Interesting...although the brain does have immune cells (macrophages), so I wouldn't claim that immune-privileged sites do not have a functioning adaptive immune system. There's also the innate immune response to consider.

Cartilege would also be interesting to look at- there's no blood supply.