Page 95 - The Cell in 40 Topics

Harun Yahya - Adnan Oktar

Carbon dioxide is thus carried from the capillary vessels through the
larger veins and finally to the heart (Figure 75). From there, it is transported
to the lungs. Following various processes that take place in the lungs, the
carbon dioxide is expelled during normal exhalation, several times a
minute (Figure 76).
There is another noteworthy feature in hemoglobin's structure. As
well as being able to transport oxygen, it can also release the oxygen it car-
ries at the right moment. The secret behind this ability lies in the chemical
bond established between the oxygen molecules and hemoglobin.
To help you fully understand the importance of this property of he-
moglobin the following analysis should be useful: If the bond established
between hemoglobin were even slightly weaker, hemoglobin would not at-
tach to the oxygen. Then oxygen molecules would fail to be carried to the

Figure 75.
Carbon dioxide reaching the heart is pumped from there to the lungs.

93