Page 127 - Design in Nature

Blood: Life-giving Fluid 125

If it were not for the heart, blood would
have been a stale, thick red fluid
(above). However, the heart pumps
blood into the remotest portions of the
body (left).

A Pressure Balanced Fluid
Haemoglobin molecules also carry nitrogen monoxide (NO) gas in
addition to oxygen. If this gas were not present in blood, its pressure would
change constantly. Haemoglobin also regulates the amount of oxygen to be
delivered to tissues by means of nitrogen monoxide. Amazingly, the source
of this 'regulation" is nothing but a molecule, i.e. a mere collection of atoms
that does not have a brain, eyes or conscious mind. Regulation of our bodies
by a collection of atoms, of course, is a sign of the infinite wisdom of Allah
Who created our bodies without flaws.

Muscle
Muscle
Muscle
Muscle
Muscle
Muscle
Muscle
Nerve
Nerve
Nerve
Nerve
Nerve
A layer of special muscle tissue wraps
the blood vessels. When the muscle
contracts, the vessel becomes narrower
and increases the blood pressure. The
picture to the right is a section of a
narrowed vessel. This is why the interior
of the vessel is corrugated (above).
Around the vessel, there are muscle
tendons (red) and a nerve (blue).