I don’t have much anatomy knowledge, and I didn’t study it anywhere…
But from looking at various pictures on the forums (thanks guys) and staring at my brothers face, i managed to create my first zbrush model…
[attach=115056]thehumanfinishedku0.jpg[/attach]
[attach=115057]thehumanfinishedheadxy4.jpg[/attach]
[attach=115058]thehumanfinishedbackna5.jpg[/attach]
if you see anywthing Anatomically ‘not so good’ please let me know. 
All critics are welcome.
Hey FreeMind, that is a good start you have there.
Do you have perspective turned on? To me it does not look like you do, perspective is so important for getting an acurate read on your model.
You have pretty much all the basics going in you model, but to me it looks like it has not quite gelled yet. What I mean is when I do a figure I play with the proportions allot and eventually it kind of comes together or gels, and feel more solid and believable. Like I said everything is pretty much there but it not quite working as whole. Also he looks a bit lumpy this is usually caused by moving to a high subdivision level to early. I head it a million times over 2 years before I really got what people meant by that. But it basically means getting some reference and going over and over the forms at a very low level until the model gels at that low level. It was surprising to me but the first time I got it because my model looked great at a very low subdivide level.
A few specific crits, the shins seem too straight, it seems to me that they curve up from the ankle to the out side of the knee and the form tapers as well.
Also the back of the ankle there is a very defined tendons that connect to the heal, that seem to be missing.
Also his crotch needs to I think go much father down into his inner thigh.
Hope that helps man Keep it up!