ave you ever asked yourself
these questions?
Should I breathe now?
Is the amount of the blood that my
heart pumps sufficient?
Which of my cells and organs require how much en-
ergy?
When should my stomach start digesting the food I've
eaten?
Is the intensity of the light entering my eye in due pro-
portion?
Which muscles should I contract in order to move
my arm?
These questions sound odd, don't they?
That is because we never ask our-
selves such questions.
24
H
H
