Page 9 - 新思维科学活动用书6 样章

1 The human body

g Predict how Marcus’s pulse rate would change if he pedalled faster on the bicycle.
Explain your answer.

1.2 The respiratory system

Focus

1 Use the words in the box to complete the sentences. You will use some words more
than once.

blood ribs lungs windpipe
nose carbon dioxide oxygen mouth

We breathe in air through our or . The

air we breathe in contains gas. The air moves down the

and into our . The in the

air then moves from the into the . We breathe

out air that contains gas. The protect our

respiratory system.

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