关于青少年吸烟PPT.ppt

Two Questions
do you see youth smoking?
do you think they smoke?
1. I think that youth smoking is wrong, negative, and harmful to health.
do you think so?
Harm of smoking
一、吸烟危害人的健康已为人们所共识,对青少年来说,危害性就更大。据医学家研究表明,青少年正处在生长发育时期,各生理系统、器官都尚未成熟,其对外界环境的有害因素的抵抗力较成人为弱,易于吸收毒物损害身体的正常生长。据美国的调查表明,吸烟开始年龄与肺癌死亡率呈负相关,吸烟开始年龄越早,肺癌发生率与死亡率越高。
First,smoking a health hazard has been the consensus for the people, for young people, the danger of smoking is even greater. According to the physician that young people are in the growth period, the various physiological systems, organs are not yet mature, and its resistance to harmful factors in the external environment is weaker than adults' , it's easy to absorb the poison damage to the body's normal growth. According to . surveys showing that the beginning age of smoking was negatively correlated with lung cancer mortality .The earlier the age of smoking is, the higher the incidence and mortality of lung cancer is.
Second, smoking damages the brain, intelligence is affected. Smoking makes people feel unconcentrated, there is even a headache, dizziness, gradually, the brain will be damaged so that thinking is retarded, memory is lost. Inevitably it affects students' performance,learning and work.
二、吸烟损害大脑,使智力受到影响。吸多了烟就会感到精力不集中,甚至出现头痛、头昏现象,久之,大脑就要受到损害,使思维变得迟钝,记忆力减退,必然影响学习和工作,使学生的成绩下降。
Third, the nicotine in o is a neurotoxin that predominantly affects the nervous system. Subjectively, some smokers feel that smoking can relieve fatigue, keep up your spirits, which is the over excitement of nervous system , in fact, the nicotine-induced euphoria. The excitement of the nervous system appears inhibited. Therefore, the sensitivity and accuracy of the neuromuscular response after smoking decreased.
三、烟草中的尼古丁是一种神经毒素,主要侵害人的神经系统。一些吸烟者在主观上感觉吸烟可以解除疲劳、振作精神等,这是神经系统的地一过性兴奋,实际上是尼古丁引起的欣快感。兴奋后的神经系统随即出现抑制。所以,吸烟后神经肌肉反应的灵敏度和精确度均下降.
reasons of youth smoking
1 curiosity
2 looking cool
3 being influenced by people around,
4 pleasur