What is this "stuff" above My T.blondi's lungs?

[Dr.Frankenstein]

I just got this T.blondi...should I be concerend with the white and yellowish spots above the lungs?
One side looks different than the other..
Has anyone seen this before?..
Also am I correct with assuming this tarantula is female?

Thank you for any advise...or comments

[xhexdx]

That's normal - nothing to worry about.

Yes, female.

[Dr.Frankenstein]

what is the "stuff "? :D

[Versi*JP*Color]

lol the T looks buff

[xhexdx]

what is the "stuff "? :D

http://giantspiders.com/anatomy.html

No, there's no label for it, but it's on all tarantulas. It's just part of their abdomen.