Focus on the essential what, how, & why of human anatomy & physiology With the 12th Edition of Essentials of Human Anatomy & Physiology, science educator Suzanne Keller joins bestselling author Elaine Marieb in helping learners focus on the essential What, How, & Why of A&P, without getting sidetracked in unnecessary details. Thoroughly updated with dozens of new figures, photos, and current information on medical recommendations and terminology, the 12th Edition continues to set the standard for brief, accessible one-semester A&P texts. The authors’ hallmark clear and friendly writing style has been strengthened with familiar analogies and abundant mnemonic cues that help students learn and remember concepts. Continuing to offer just the right balance of anatomy, physiology, and clinical coverage, engaging new chapter previews help learners hone in on what structures and functions they are studying, how they function, and why they are important to learn.