Essentials of College Human Biology is a product of many years of teaching, research and extensive evaluation of students in the human biology syllabus for non-majors. It has been written in a concise, clear and readable format to aid understanding, effective learning as well as teaching of the subject. It provides an alternative for non-biology major students who in many cases have to rely on textbooks recommended for biology majors to pursue this course. The book is organized into three sections, and each section provides the relevant information for non-biology majors who take this course as a prerequisite for their main programs. Section 1 treats the Basic Principles of Human Biology and Diseases; Section 2 treats the Human Biology Issues and Actions and Section 3 provides 961 Questions and Answers that cover the 34 chapters in sections 1 and 2. Answers are provided immediately after each question. It is the author’s belief that students who study well from the book will do so to their greatest advantage - in terms of understanding and ultimate performance in the subject. The content of each section of the book is listed below: Section 1 covers the following topics: 1. The Scientific Method; 2. Life Chemistry; 3. The Cell; 4. Body Organization; 5. Variation and Inheritance; 6. Cell Division; 7. Tumors and Cancer; 8. Muscular System and Disease; 9. The Skeletal System and Disease; 10. Nervous System and Disease; 11. Respiratory System and Disease; 12. Cardiovascular System and Disease; 13. Renal System and Disease; 14. Endocrine System and Disease; 15. Homeostasis; 16. Diabetes; 17. Body Defense Mechanisms; 18. Nutrition and Disease; 19. Reproduction and Disease; 20. Sensory Organs and Disease; 21. Ecology, the Environment and Humans. Section 2 covers the following topics: 22. Stress and Stress Related Disorders/Diseases; 23. Substances that Affect the Nervous System (Substances of Abuse); 24. Inflammation; 25. Food; 26. Birth Defects; 27. Population; 28. Natural Resources, Conservation and Preservation; 29. Pollution; 30. International or Global Civil Organizations; 31. Infectious Diseases; 32. Vaccine; 33. Genetic Engineering/Biotechnology; 34. Evolution. Section 3 has 961 answered questions covering all 34 chapters