1. The Human Body: An Orientation.
2. Chemistry Comes Alive.
3. Cells: The Living Units.
4. Tissues: The Living Fabric.

Unit Two:  Covering, Support and Movement of the Body
5. The Integumentary System.
6. Bones and Skeletal Tissues.
7. The Skeleton.
8. Joints.
9. Muscles and Muscle Tissue.
10. The Muscular System.

Unit Three: Regulation and Integration of the Body
11. Fundamentals of the Nervous System and Nervous Tissue.
12. The Central Nervous System.
13. The Peripheral Nervous System and Reflex Activity.
14. The Autonomic Nervous System.
15. The Endocrine System.

Unit Four: Maintenance of the Body
16. Blood.
17. The Cardiovascular System: The Heart.
18. The Cardiovascular System: Blood Vessels.
19. The Lymphatic System.
20. The Immune System: Innate and Adaptive Body Defenses.
21. The Respiratory System.
22. The Digestive System.
23. Nutrition, Metabolism, and Body Temperature Regulation.
24. The Urinary System.
25. Fluid, Electrolyte, and Acid-Base Balance.