Unit 1 Human Body as a Whole Text A Text B Unit 2 Human Diseases Text A Text B Unit 3 The Skeletal System Text A Text B Unit 4 The Muscular System Text A Text B Unit 5 The Digestive System Text A Text B Unit 6 The Respiratory System Text A Text B Unit 7 Cardiovascular System I: The Blood and Blood Circulation Text A Text B Unit 8 Cardiovascular System II. The HearndBlod Vessels .. Text A Text B Unit 9 The Lymphatic System and Immunity Text A Text B Glossary