Unit 1. Organization of the body. The human body : an orientation -- Chemistry comes alive -- Cells : the living units -- Tissue : the living fabric -- Unit 2. Covering, support, and movement of the body. The integumentary system -- Bones and skeletal issues -- The skeleton -- Joints -- Muscles and muscle tissue -- The muscular system -- Unit 3. Regulation and integration of the body. Fundamentals of the nervous system and nervous tissue -- The central nervous system -- The peripheral nervous system and reflex activity -- The autonomic nervous system -- The special senses -- The endocrine system -- Unit 4. Maintenance of the body. Blood -- The cardiovascular system : the heart -- The cardiovascular system : blood vessels -- The lymphatic system and lymphoid organs and tissues -- The immune system : innate and adaptive body defenses -- The respiratory system -- The digestive system -- Nutrition, metabolism, and body temperature regulation -- The urinary system -- Fluid, electrolyte, and acid-base balance -- unit 5. Continuity. The reproductive system -- Prenancy and human development -- Heredity.