The book has been organized with a structured approach as per the latest NEET syllabus requirement. A relatively conventional sequence of subjects is followed. Chapters 1 and 2 cover the diversity and classification of animal kingdom; Chapters 3 and 4 elucidate structural organization in animals; Chapters 5 through 11 deal with animal physiology; Chapters 12 to 14 discuss reproduction in organism specifically humans and their reproductive health; Chapter 15 introduces evolution; Chapters 16 and 17 explains how zoology is useful for the human welfare; Chapters 18 and 19 present an overview of the vast topic of biotechnology and its application.