I'll throw my opinion in this as well. Anatomy is not needed, but I would recommend to anyone to take a human anatomy course, if possible. I had a year of human A&P, in addition to a year of cadaver dissection, and it has helped me tremendously. But there are also other students who have never had anatomy and they are doing just fine. In the classes I had, we had to know the brachial plexus, cranial nerves, etc., but, obviously, not to the gritty detail we have learned in school so far.
But, for the love of God, DO NOT sit over the summer with your nose stuck in an anatomy book. It won't help you b/c seeing the 3D relationships in a real cadaver is SO much more helpful than the ideal bodies found in anatomy atlases. Please RELAX over the summer, do absolutely nothing related to studying.......save that for school.