F.1 English's I.S.

Questions

1. The diagram below shows the foetus inside the uterus of a pregnant woman.

(a) (i) State the improtance of structure placenta.

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更新:

(b) Write down two funtions of the watery fluid.

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更新 2:

(c) Explain why doctors do not recommend (建議) pregnant women to take vigorous exercise.

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更新 3:

(d) Why is it important for the foetus to come out of the mother with the head frist during brith?

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1 個解答

評分
  • 1 十年前
    最愛解答

    1a)-exchange of substance between foetus and mother take place in placenta

    -increase the rate of diffusion

    -attach the foetus to the uterus wall

    -it secrete hormone which maintain pregnancy

    b)it act as shock absorber

    it keep a constant temperature around the feotus

    c)vigorous exercise easy make embryo to remove

    d)as reduce the chance of lack of breath

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