Page 52 - The Miracle of the Blood and Heart

THE MIRACLE OF THE
BLOOD AND HEART

ment that allows the oxygen molecule to attach to the hemo-
globin is high partial pressure of oxygen in the lung tissue. As
the partial pressure of oxygen falls in other body tissues, the
loose bond between the oxygen and hemoglobin breaks, sep-
arating the oxygen from the hemoglobin.
This mechanism forms the basis of the transportation of
oxygen from the lungs to the tissues. 25 Such a mechanism has
to operate constantly in the body. If the partial pressure of oxy-
gen does not fall at the requisite time and place, then the tis-
sues will be unable to take oxygen in, and a tissue deprived of

oxygen will shortly die.
The same thing applies to blood pressure. A hemoglobin
molecule can determine how much oxygen it will release to a
tissue only when blood pressure is stable. This pressure in the
blood can remain stable thanks to nitrogen monoxide, anoth-
er molecule carried by the hemoglobin molecule in addition to
oxygen and carbon dioxide. If hemoglobin did not also carry
nitrogen monoxide, then the blood pressure would constantly

Thanks to the nitrogen
monoxide it carries,
hemoglobin "knows" how
much oxygen to release in
which tissue. The nitrogen
monoxide transported by
hemoglobin ensures that
blood pressure remains
stable throughout the
body. The amount of oxy-
gen that needs to be
released in the tissues is
determined by the
blood pressure.
Harun
Yahya

50