Unit 1 Introduction to Anatomy 1 Introduction to Human Anatomy and Body Organization 2 Microscopes Unit 2 Cells and Tissues 3 Cellular Anatomy and Mitosis 4 Membrane Transport 5 Histology Unit 3 Protection, Support, and Movement 6 The Integumentary System 7 Skeletal Overview 8 The Axial Skeleton 9 The Appendicular Skeleton 10 Articulations and Body Movements 11 Muscle Organization and Contractions 12 Axial Muscles 13 Appendicular Muscles Unit 4 Control and Integration 14 The Spinal Cord and Reflex Arcs 15 The Brain 16 Senses 17 The Endocrine System Unit 5 Internal Transport and Gas Exchange 18 Blood Tests 19 The Heart 20 Blood Vessels 21 The Lymphoid System 22 The Respiratory System Unit 6 Nutrient Absorption and Water Balance 23 The Digestive System 24 The Urinary System Unit 7 Reproduction 25 The Reproductive System