4. Use the bar graph in Figure 4 to answer questions a through e below.
a. At birth, what is the average number of red blood cells per
mm' of blood?
b. What appears to happen to the number of red blood cells
between birth and 2 months?
c. What happens to the number of red blood cells between the
ages of 6 and 8 years?
d. Between what ages is a human likely to have 4.6 million red
blood cells?
e. After 14 years of age, do males or females have a higher red
blood cell count?
Red Blood Cell Count During Human Growth
5.7
5.6
5.5
5.4
5.3
5.2
5.1
Average RBC count(million/mm2 of blood)
5.0
4.9
4.8
4.6
0
Birth 2 4 6 8 10 12 2
4 6
8
10 12 14+ 14+
(M) (F)
Months
Years
Time
Figure 4