第二十课

twenty20

Our breath我们的呼吸

1．Our life needs breathing.我们的生命活动需要呼吸。

2．What organs do we use to breathe?我们呼吸时要用到哪些器官呢?

Activity process活动过程

3．Know our breathing apparatus.认识我们的呼吸器官。

4．nose鼻

5．pharynx咽

6．larynx喉

7．air tube气管

8．lungs肺

9．bronchus支气管

10．Do we breathe in and out the same gas?我们吸进和呼出的气体相同吗?

11．We inhaled air.我们吸入的是空气。

12．Exhaled gases may have...呼出的气体可能有....

13．Do an experimental study.做个实验研究一下吧。

Methodological guidance方法指导

14．Use a syringe to inject air into the clarified lime water through a long catheter.

用注射器通过长导管向澄清的石灰水中注入空气。

15．Blow air into the clarified lime water through a long pipe through the mouth.

用嘴通过长导管向澄清的石灰水中吹气。

Data Card资料卡

16．After the human body absorbs the air, consumes part of the oxygen in the body, exhales the gas to increase the carbon dioxide.

人体吸进空气后,在体内消耗了部分氧气,呼出的气体中二氧化碳增多。

17．The nutrients absorbed by the digestive organs release the energy needed for life activity after reaction with the oxygen absorbed by the respiratory organ.

消化器官吸收的养料与呼吸器官吸收的氧气反应后释放出生命活动所需的能量。

18．How to protect our respiratory organs? 如何保护我们的呼吸器官?

19．Open windows勤开窗通风

20．Active participation in physical exercise积极参加体育锻炼

21．Wear a mask when you go out in cold weather寒冷天气外出时要戴口罩

22．Also note that...还要注意....

23．Outreach activities拓展活动

24．Consult data to understand the harm of smoking to respiratory organs.

查阅资料，了解吸烟对呼吸器官的危害。

Unit evaluation单元评价

Knowledge Park知识乐园

Fill in a fill, say say. 填一填，说一说。

 fat脂肪

 nutrition营养

Ingredients成分消化食物

 nose鼻

oral cavity口腔

 form组成

 peptic 消化器官

Digestion and breathing消化与呼吸

 respiratory apparatus呼吸器官

 form组成

 protect保护

Open windows勤开窗通风

 measure措施

not picky on food不挑食

protect保护

 measure措施

The Hall of Science科学殿堂

Why eat slowly?吃饭时为什么要细嚼慢咽?

Reflection on Space反思空间

My Harvest我的收获

●Steamed bread contain starch馒头里面含有淀粉

I want to improve我想改进的

●Test the composition of exhaled gas.检验呼出气体成分的实验。

I want to continue exploring the我想继续探究的

●How to prevent the common diseases of the digestive organs?

 如何预防消化器官的常见疾病?