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Life Cycle - Human Biology (6A)
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Life Cycle - Human Biology (6A)
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PROBLEM: Does a fetus grow at a constant rate?PREDICTION:
MATERIALS: ruler, fetus growth chart, timetable of fetal development, calculator
PROCEDURE: Measure the fetus in the chart as it grows through time. Record the information below and try to find the period during the pregnancy when the growth is at its highest rate. To figure this you must count the weeks between the measured period. This baby will be 20 inches long after its born. The growth rate can be calculated by dividing the growth by the number of weeks.
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# |
Size |
Growth |
Growth |
% |
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5th week |
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8th week |
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12th week |
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18th week |
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22nd week |
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26th week |
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30th week |
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34th week |
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36th week |
Why is the baby turning around in the womb?
Look at the "Timetable of Fetal Development."
1. When do the gallbladder and liver form?
2. Primitive blood vessels form when?
3. Eyes open?
Eye lens form?4. Fetus has downy hair over its body
5. When does a baby become plump?
CONCLUSIONS: When does the greatest growth rate occur?
