Life Cycle - Human Biology (6A)
Lab 


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.

 

#
Weeks

Size
cm

Growth
cm

Growth
Rate

%
Growth

5th week

         

8th week

         

12th week

         

18th week

         

22nd week

         

26th week

         

30th week

         

34th week

         

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?

 

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