Page 93 - The Cell in 40 Topics

Harun Yahya - Adnan Oktar

Figure 73.
Hemoglobin in the red blood cells releases the oxygen the cells need .

The oxygen molecule is transported to the cells by a molecule inside
the erythrocytes known as hemoglobin, which possesses a very special cre-

ation. In external appearance, it resembles a kind of donut with a thick
membrane covering the central hole and is ideally suited to carrying both
oxygen and carbon dioxide. Bonding to the oxygen molecules in the lung,
hemoglobin sets out for the farthest parts of the body by way of the blood-
stream. When it reaches the tissues that need oxygen, another miracle takes
place. The hemoglobin molecule's very special design is affected by its
chemical environment, and the chemical bond between it and the oxygen

breaks. As a result, the hemoglobin deposits the oxygen molecules it is car-
rying, which permit life to continue in the surrounding cells (Figure 73.)
The duties of hemoglobin do not end here. It also plays an essential
role in transporting the carbon dioxide that needs to be removed from its

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