God Arises
Nature and Science Speak about God
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The heart is specially built for the immense job it
has to do. Its walls are made up of very tough
muscular fibres, and it is surrounded by a double
membrane (the pericardium) containing a fluid that
lubricates its continual movement. The beat of the
heart takes place in two steps, as first the upper and
then the lower half contracts. This enables each half
of the heart to rest while the other is beating. Inside,
the heart is divided into 4 chambers, two upper
chambers called the auricles and two lower
chambers called the ventricles. Blood always flows
from the auricles to the ventricles, and this one-way
traffic is maintained by umbrella-shaped valves
which guard the openings between the two sets of
chambers.
Digestion:
The digestive system can be looked
upon as a factory where food is tasted by the
tongue, then crushed by the teeth, moistened with
saliva and finally, —after elaborate precautions to
avoid shunting mistakes — is pushed through the
gullet into the stomach, a chemical plant where the
most astonishing changes occur. Here millions of
cells, too small to be seen, produce a dozen highly
complex chemicals which break up the food we
