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2019-2020年北师大版高中英语选修七Unit 21Human Biology（warm up）word学案学习目标By the end of the class, the students will be able to: Learn some words about our body学习过程课堂活动（一） 预习交流Do You Look After Yourself ? 1.How many hours do you sleep per night ?a) under 6 hours b) about 7 or 8 hours c) more than 9 hours 2.How often do you clean your teeth ?a) once a day b) twice a day c) after every meal 3.How often do you do physical exercise, enough to make you out of breath ?a) never b) once a week c) two or three times a week 4.How often do you eat sweets or chocolate? a) never b) sometimes c) every day 5. How many pieces of fresh fruits do you eat per day ?a) One or two b) more than two c) none（二） 合作探究n. 听觉n.间隔；间歇n. 脉搏vt. 消化vi. 交换intervaldigestswaphearingpulseRead the words,then match the words with their Chinese meanings.Find six key words to label the parts of the body in the diagram.（三） 分层提高Look at the following statements and decide which part of the body is described.This organ weighs about a kilo and is made up of two sides. It is like a super puter that processes information. This organ is like a bag which reeives everything you eat.It digests your food and sends vitamins and minerals into the blood.This organ beats at regular intervals 100,000 times a day. With each beat, it circulats 80 ml of blood through the bodythats 8,000 litres of blood per day! It pumps blood into the lungs, where it receives oxygen, Before being pumped around the rest of the body.This is a very delicate organ. There aretwo in a body and they have delicate lids which protect them. Light enters and reaches special light sensitive cells. Thesework like a camera and finally send signals to the brain.These organs absorb oxygen and get rid of carbon dioxide. They are found on either side of the heart. They receive air as a result of breathing and when blood passes through, They give it oxygen. （四） 总结归纳（五） 巩固反馈WordsPreview lesson 1
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