17. What is hemoglobin? What
is the inorganic element that
is fundamental in the
composition of hemoglobin?

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is the protein present in the
blood responsible for the transport of
from the lungs to the tissues
and cells.

The hemoglobin molecule is composed
of four chains, each with a heme
group containing an atom. The iron
is responsible for the binding of oxygen
in the lungs and also for the red color of
hemoglobin and thus of the blood.