基础医学英语教学课件：Unit 2 The Heart.ppt

,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,UNIT 2,Passage A,The Heart,Lecturer:,chen,xiaori,1221rose,Key terms,ventricle,-ventricular(adj.),atrium,-atria(pl.)-,atrial,(adj.),systole,-systolic(adj.),diastole,-diastolic(adj.),di,-,:expand,cardiac,adj.of the heart,skeletal muscle,骨骼肌,smooth muscle,平滑肌,striated,adj.横纹的,intercalated disc,闰盘,the Purkinje fiber,浦肯雅纤维,the Bundle of His,房室束,atrial,心房的,sinus,-,窦,sino,atrial,ventricular,atrium,atrio,ventricular,sep,tum,separate,divide,septal,a.,隔膜的,scope:,instrument,stetho,:,chest,stetho,scope,oxygenate,oxygenated blood,含氧血,deoxygenated blood,缺氧血,small,artery,arteri,ole,bronchi,ole,vein,ven,ule,small,vary,change,vari,cose,artery,-arterial,vein,-venous,aorta,-aortic,The anatomy of the Heart,Read Para.1,1.,compare skeletal muscles,smooth muscles and cardiac muscles.,2.,What is unique about cardiac muscles?,skeletal muscle,voluntary,striated,smooth muscle,involuntary,smooth,cardiac muscle,involuntary,striated,cross-striation:,横纹,myocyte,：肌细胞,nuclei:,核,(nucleus,的复数,),intercalated disc,What are the functions of the,atria,?,What are the functions of the,ventricles,?,What are the functions of the,valves,?,Questions for Paragraph 2,1.,The,atria,are responsible for receiving blood from the veins,.,2.,Ventricles,force the blood away from the heart,.,3.,Valves,allow blood to flow only in one direction.,What initiate impulses in the heart?,What is the major function of the,Purkinje fibers,?And how do they work?,What is the,pacemaker,of the heart?And why?,Questions for Paragraph 3,1.,The,SA,and the,AV,initiate impulses.,2.The,Purkinje fibers,form a pathway for conduction of the impulse which ensures that the heart muscle cells contract in the most efficient pattern.,3.The,SA node,.Because the cells in the SA node contract the most times per minute,and cardiac muscle cells are connected to each other by intercalated discs.,房室束,左右束支,What i,s,systole,?,What is,diastole,?,Questions for Paragraph,4,diastole,systole,1.How does the,pulmonary circuit,work?,2.How does the,systemic circuit,work?,3.What kind of blood do,arteries,and,veins,carry respectively?,The pulmonary and systemic circuits,Questions for Paragraph 5-6,1.In the,pulmonary circuit,blood leaves the heart through the pulmonary arteries,goes to the lungs,and returns to the heart through the pulmonary veins.,2.In the,systemic circuit,blood leaves the heart through the aorta,goes to all the organs of the body through the systemic arteries,and then returns to the heart through the systemic veins.,3.Most of the time,arteries,carry oxygenated blood and,veins,carry deoxygenated blood.But there are exceptions,the pulmonary arteries leaving the right ventricle for the lungs carry deoxygenated blood and the pulmonary veins carry oxygenated blood.,The heart is supplied with oxygenated blood by _.,Para.7,coronary artery,回旋动脉,左前降动脉,The blood vessels,What are the three types of,vessels,?,And what are their characteristics and functions?,Questions for Paragraph 8-9,characteristics,functions,arteries,veins,capillaries,have layers of smooth muscles and elastic muscles,elastic,have layers of smooth muscles and elastic muscles,have valves,very thin and branching,Expand to accept the blood being forced into them from the heart,and squeeze this blood on to the veins when the heart relaxes,Circulate the blood back to the heart.Arteries carry it away from the heart,also the veins carry blood at lower pressures and carries,de-oxygenated blood.,In the capillaries,the exchange between the blood and the cells of the body take place;the blood releases its oxygen and takes on carbon dioxide.,Class work,functions,atria,ventricles,valve,coronary artery,lymphatic,tonsil,aden,oid,palatine,bronchi,ole,epiglottis,trache,otomy,cavity,pharynx,larynx,trachea,bronchus,cilum,mucus,epi,thelial,mucous membrane,T,erms,R,evi,sion,HOMEWORK,Write a report on“,circulatory system,”and you can focus on any aspect you are interested in.,Prepare for the oral presentation(,10,minutes)using PowerPoint and present it next time,.,