Volume 1 (Skeletal System, Joints and Ligaments and Movements of the Body) has 175 cards and covers bones and bony landmarks, joints and ligaments, common movements and synergists/antagonists.Beautiful, hand-drawn illustrations in a two-color formatPage references in the bottom corner for finding more information in Trail Guide to the BodyCall-out letters (a, b, c, d) next to each structure to help you identify the specific structure in questionBinder ring that lets you organize cards to study only those you needDurable, coated cards (5 1/2" x 4") that are easy to handle and made to last