Page 43 - 新思维科学学生用书6 样章
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1 The human body
Continued
4 a What is puberty?
b Describe two body changes that happen in both boys and girls
during puberty.
5 a Match each of the body’s defences with the way it helps to protect
the body from disease.
Body defence How it protects the body from disease
tears traps germs
mucus stops bacteria entering the body
contain a chemical substance that kills some
stomach acid
bacteria
skin kills bacteria in food we have eaten
b Explain why we should clean cuts and wounds and cover them
with a plaster.
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