First Aid for the Basic Sciences: Organ Systems, Third Edition is a unique single-source review of the entire second year medical school curriculum. This full-color, richly illustrated, and engagingly written resource provides readers with a solid understanding of basic sciences relative to human organ systems which all medical students must be familiar. When used with the companion review First Aid for the Basic Sciences: General Principles, Third Edition, this powerful combination distills must-know course information to help students survive their first two years of medical school and provides an in-depth review for the USMLE Step 1.