Keeping healthy 苏州外国语学校 蒋元琪 ---the heart and pulse rate 《苏州双语综合读本》

Let’s have a quiz.

Q1: Do you know you have something that moves like a river inside you. It goes to every part of your body. It carries oxygen( 氧 气 ) and nutrients( 营养 ). What do you think it is? Blood

Q2: What do you think makes the blood move around the body? heart

Q3: How big is your heart? A.as big as your liver B.as big as your fist C.as big as your head

Q4: Where is your heart? A.in the right of your chest B.in the middle of your chest C.in the left of your chest

Q5: Your heart contracts____ A.regularly B.irregularly C.crazily

Q6 ： Your heart pumps blood _____ around your body A. around your body to your lung B. to your lung oth A and B C. both A and B

Q7: How many chambers( 腔 ) are there in a heart? A. two B. four C. six

There are four chambers( 腔 ) in the heart –—— two atriums( 心房 ) and two ventricles( 心室 ).

Q8: When resting, it takes __ for blood to be pumped to your brain and back to your heart. A. 1 minute B. 6 seconds C. 1 second

Feel your heart now!

Pulse : The pulse rate is the number of heartbeats per minute. Each beat of the heart can be felt as a pulse.

Pulse the wrist, the neck, the upper arm, the temple, behind the knees, or on top of the foot

Scientific Enquiry Pulse rate (beats per minute) Name 1st try 2nd try 3rd try Middle reading Michelle

Group No. of Children Pulse rate below 60 0 Pulse rate from 60 to 69 7 Pulse rate from 70 to Pulse rate from 80 to Pulse rate from 90 to 99 1 Pulse rate above Typical pulse rates in Class 2

Pulse Rates Bar Chart in class 2 Which was the most common range for pulse rates for the whole class?

Resting heart rate Age or fitness level Beats per minute New born Babies: 100 – 160 Children age 1 to 10: 60 – 140 Children age 10+ and adults: 60 – 100 Athletes( 运动员 ): 40 – 60

How does exercise affect our heartbeat?

Scientific Enquiry What sort of exercise will you do? What sort of exercise will you do? Will you keep to one sort of exercise? Will you keep to one sort of exercise? What will each of you do? What will each of you do? Draw a line graph. Draw a line graph.

How does the time you exercise affect your pulse rate? Length of exercise (seconds) Pulse rate

Let’s start

What have you got?

Surf the internet to do some further research. Write a research paper on Keep Your Heart Happy body.htm Assignment: