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1、Unit 3,Smoking,Lead-in Background Information Words and Phrases Medical suffix Translation Sentences Assignment,Lead-in Part-smoking,What does a length of cigarette consist of ? In other words, Why is the cigarette so “charming“ to some people?,Nicotine 尼古丁 tar焦油 一氧化碳carbon monoxide 一氧化氮nitric oxide
2、 氢氰酸 丙烯醛,Brainstorming:,1.In what way is smoking harmful?,2.What advice would you give to someone who wanted to quit smoking?,From the medical viewpoint,Smoking can lead to stroke.,Smoking may cause the other diseases:,哮喘 Asthma sm, z- 肺癌 lung cancer 肺气肿 emphysema ,emfisi:m .,Respiratory system,Phar
3、ynx friks 咽部 Larynx lriks 喉部 Trachea trki: 气管 Bronchi brkai 支气管 Bronchiole brkiul n. 解剖 细支气管 Alveoli lvilai n. 肺泡；齿槽；巢房,Respiratory system,The primary function of the respiratory system is to supply the blood with oxygen in order for the blood to deliver oxygen to all parts of the body. The respirat
4、ory system does this through breathing. When we breathe, we inhale oxygen and exhale carbon dioxide. This exchange of gases is the respiratory systems means of getting oxygen to the blood.,Respiration is achieved through the mouth, nose, trachea, lungs, and diaphragm. Oxygen enters the respiratory s
5、ystem through the mouth and the nose. The oxygen then passes through the larynx (where speech sounds are produced) and the trachea which is a tube that enters the chest cavity. In the chest cavity, the trachea splits into two smaller tubes called the bronchi. Each bronchus then divides again forming
6、 the bronchial tubes.,The bronchial tubes lead directly into the lungs where they divide into many smaller tubes which connect to tiny sacs called alveoli. The average adults lungs contain about 600 million of these spongy, air-filled sacs that are surrounded by capillaries. The inhaled oxygen passe
7、s into the alveoli and then diffuses through the capillaries into the arterial blood. Meanwhile, the waste-rich blood from the veins releases its carbon dioxide into the alveoli. The carbon dioxide follows the same path out of the lungs when you exhale.,2. How to Ban Smoking?,No smoking Day firstly
8、started in America in 1984. It aimed at all people who would like to give up smoking, including teenagers. Each year, many countries carry out (进行) all kinds of campaigns (活动) on this day to help smokers to quit.,No Smoking Day May, 31st 禁烟日,Ban Smoking,Ads of Forbiding smoking,Individual,Background
9、 Information,First-hand smoking Second-hand smoking Third-hand smoking,First-hand smoking,We can look at cigarette smoke in three ways. Mainstream (firsthand) smoke is the smoke that a smoker inhales. Obviously, it is harmful to be smoker, although the cigarette filter sifts some of the toxins (tar)
10、 out.,Second-hand smoking,Secondhand smoke is the combination of the mainstream smoke that come off the burning end of the cigarette into the environment. Volume for volume, side-stream smoke is more hazardous than mainstream smoke because it is unfiltered.,Third-hand smoking,Winickoff and Colleague
11、s have now given us a new name for the toxic particles that settle as dust in rooms and on clothing that have been exposed to cigarette smoke. They call this third-hand smoke, or “residual tobacco smoke contamination that remains after the cigarette is extinguished.”,In summary,While first-hand smok
12、e is that inhaled directly by the smoker and second-hand is the smoke exhaled (and inhaled by others), third-hand smoke is the residue from second-hand smoke.,TEXT Questions:,1. What is smoking and its history?,2.What diseases can smoking cause?,3.What is the current situation of tobacco-caused dise
13、ases?,重点四、六级词汇表,From overview: Inhale evolve offerings alter enlightenment institute Curb deter enforce premature death be cited as From SIVC1: Well-documented negate survival odds quit the habits From SIVC2: be associated with=be linked to kick the habits postpone From SIVC3: Take up the habit over
14、take susceptible trigger,From SIVC4: Pick up expose out-rated depict harness From S1VC5: Put doubt to a rest shake the habit plague In contradiction downside on the rise resonate From S1VC6: Be hooked on addictive screening horn in fuel From S1VC7: Claim lethal crunch be subject to comment on regula
15、te proponent From S1VC8: Treacherous residual extinguish air-bound compounds Linger,Words and Phrases,Inhale v. Evolve v. Offerings n. Enlightenment n. Institute v. Launch v. Enforce v.,Inhale v. to take air,smoke,gas,etc. into your lungs as you breathes 吸入，吸气,She closed her eyes and inhaled deeply.
16、 她合上双眼，深深地吸了一口气。 He inhaled deeply on another cigarette. 他又点了一根烟，深深地吸了一口。 Local residents needed hospital treatment after inhaling fumes from the fire. 反义词 Exhale v. 名词 Inhalation Hundreds of children were treated for smoke inhalation.,evolve,Develop gradually,especially from a simple to a more complicated form;使.逐渐发展，形成 The company has evolved into a major chemical manufacturer. Each sch
