You'll never get anatomy right unless you know how the bone and muscle structure works, so hath my teachers spoken. As a result I spent all weekend drawing skeletons, mostly reproduced from several photocopies our professor supplied us with, so I don't recommend you use these as references for "accurate" skeletal anatomy. Don't come crying to me when your biology teacher roars at you for mislabelling the femur, because I'm only going to laugh and tell you that I told you so.
You may have to download to see it full-sized.
--Sak Tommaso Calderone and Lawrence Selwyn (C) Myself, Shamine A. King.
Ha, ha! Browsing my favourites and found this, I added it at least 5 months ago. Realised I've loved your work longer than I thought. You're very talented btw. ^^
Can you explain me how to draw the rib cage without getting confused. If I try I start t see the rib cage blurred and I can't draw it. I have no problem with the rest of the skeleton (well, I'm still learning).
Unfortunately you can only learn to draw it from copying, unless you have a physical reference lying around. Try to start with a simple shape like a half-oval for the shape of the cage and then add the ribs, have you tried that?