Our Heart

Monday (22/06/2009)

Game: Win, lose or draw.
· This is a game whereby, a person would draw a picture and the other people would guess the message of it.
· First, I drew and the kids guessed. Then, the kids drew and their friends guessed.
· We have interesting sentences.
· Among: The butterfly is singing. The frog is listening to the radio. The crocodile is plating basketball, The table is flying in the sky.

The Cardio System: Our Heart
· Jen Ning: Without a heart, we will die.
· Zi Jun: A heart pumps blood, teacher.
· Foo Soon: A heart gives us energy.
· A heart size is similar to our fist. It’s job is to pump blood to all our body parts.
· Yun Zhe: What colour is the blood with Oxygen?
· When we breathe, Oxygen goes into our nostrils, throat, lungs and into the alveolus. Oxygen here will be absorbed into our heart which pumps through the heart to body parts. Its chilli red colour and in most books, this is symbolised by red colour arrows.
· Reaching the end of this body part, the blood with non-Oxygen would flow back to the heart and then into the alveolus so that we can breathe the Carbon Dioxide out again.
· Some people with heart problem can replace with another donor’s heart.
· Some even rely on machines to pump their blood.

Measuring Heartbeat.
a) Most kids couldn’t find the heartbeat. We tried with two fingers touching our wrist. However, most kids found them vague. So, we changed the location to the pulse under our neck and it was better.
b) We tried calculating the beats per minute which was very challenging for the kids.
c) By looking at the clock, the kids know that there are 3 needles on a clock. The longest needle is the second needle. 60 seconds = to 1 minute. Thus, the kids now calculate their pulse for only 10 seconds and we times by 6. Rather, we also added them 6 times. Most kids were successful. Averagely, a healthy kid has 80 beats compared to an adult of 72.
d) Yun Zhe: Why? Teacher: Because they are growing up and their body is more active. They usually breathe twice faster than us.Next, we jumped on the spot for 30 times and calculated our pulse again. The heartbeat has increased due to we need more Oxygen to help our body at jumping.