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本系列教材由《基础医学英语》、《临床医学英语》、《医学英语听与说》、《医学英语写作与翻译》四册组成。 《基础医学英语》共18课。每课由两部分组成：Section A为术语，Section B为两篇文章。书后附有练习答案，Passage A的译文和词汇表。

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The Airways and BIood Vessels para 1 During inspiration air passes through either the nose(the most com- mon site)or mouth into the pharynx(throat)，a passage common to both air and food．The pharynx branches into two tubes，the esopha- gus through which food passes to the stomach，and the larynx， which is part of the airways．The larynx houses the vocal cords， two folds of elastic tissue stretched horizontally across its lumen． The flow of ai r past the vocaI cords causes them to vibrate，produ． cing sounds．The nose，mouth，pharynx and larynx are termed the upper airways． para 2 The larynx opens into a long tube，the trachea，which in turn bran- ches into two bronchi，one of which enters each lung。Within the lungs，there are more than 20 generations of branchings，each resul- ting in narrower，shorter，and more numerous tubes．The walls of the trachea and bronchi contain cartilage．which gives them thei r cy- lindrical shape and supports them．The first ai rway branches that no longer contain cartilage are termed bronchioles．Alveoli first begin to appear，attached to the walls of respiratory bronchioles。The number of alveoli increases in the alveolar ducts，and the airways then end in grapelike clusters consisting entirely of alveoli．The air- ways，Iike blood vessels，are surrounded by smooth muscle，the contraction or relaxation of which can alter airway radius． para 3 The airways beyond the larynx can be divided into two zones：(1) The conducting zone extends from the top of the trachea to the be- ginning of the respiratory bronchioles；it contains no alveoli and there is no gas exchange with the blood．(2)The respiratory zone， which extends from the respiratory bronchioles on down，contains alveoli and there is an exchange of gases with the blood．

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Unit 1 Section A Terminology Section B Passages Passage A The Skeletal System Passage B Amplication of DNA by the Polymerase Chain Reaction Unit 2 Section A Terminology Section B Passages Passage A The Brain and Its Functions Passage B Other Parts of the Nervous System Unit 3 Section A Terminology Section B Passages Passage A Blood Passage B General Princi ple of PhysicaI Examination Unit 4 Section A Terminology Section B Passages Passage A The Endocrine System Passage B Action and Secretion of Hormones Unit 5 Section A Terminology Section B Passages Passage A The Digestive System Passage B Cl inical and Pathological Conditions of the Digestive System Unit 6 Section A Terminology Section B Passages Passage A Urine Formation Passage B PathophysioIogy of the Kidneys Unit 7 Section A Terminology Section B Passages Passage A Uterus and Menstrual Cycle Passage B Fertilization,Implantation and Early Development Unit 8 Section A Terminology Section B Passages Passage A The Cardiovascular System Passage B Factors Determining Arterial Pressure and Hypertension Unit 9 Section A Terminology Section B Passages Passage A Respiratory System(I) Passage B Respirator~y System(Ⅱ) Unit 10 Section A Terminology Section B Passages Passage A Tumor Passage B Cancer Unit 11 Section A Terminology Section B Passages Passage A Cell Death Passage B Clones：Will There Be"Carbon Copy"People? Unit 12 Section A Terminology Section B Passages Passage A The Relationshi ps Between Epstein-Barr Virus，Malignancy，and Immunodeficiency Passage B HIV in Older Adults Unit 13 Section A Terminology Section B Passages Passage A Genetic Transfer Mechanisms and the Transmission of Drug Resistance in Bacteria Passage B Genetic Counseling Unit 14 Section A Terminology Section B Passages Passage A Definition and Nature of Inflammation Passage B The Control of Microorganisms by Chemical Agents Unit 15 Section A Terminology Section B Passages Passage A Pathology Passage B Classification of Disease Unit 1 6 Section A Terminology Section B Passages Passage A Pharmacodynamics and Pharmacokinetics Passage B Tumor Pathology Unit 17 Section A Terminology Section B Passages Passage A Animal Experiment Passage B Nursing Unit 18 Section A Terminology Section B Passages Passage A Psychology：the Search for Understanding Passage B Health Care System Key to Exercises 参考译文 Glossary

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