Some memorization tips:
– Make sure that you practice naming without looking at the back of your flash card.
– Touch the part of your body where the muscle, bone or organ is found as you say it in your head.
– Imagine yourself using that muscle, bone or organ as you say it. If possible, make the imagined use funny or sexy – either one will stay with you longer!
– Take a section or group you are having particular difficulty with and make it the last thing you look at before going to sleep and the first thing you look at when you wake up in the morning. (I have no scientific backing for this idea – but it seemed to help me.)