Tortora's textbook, "Principles of Anatomy and Physiology," is widely used in healthcare education because it provides a comprehensive and systematic approach to teaching anatomy and physiology. The textbook has several features that make it an essential resource for students and instructors:

: This is the book’s central mantra—anatomy (structure) and physiology (function) are inseparable. For instance, it explains how the biconcave shape of a red blood cell isn't random but is specifically designed to maximize oxygen transport.