Our bodies and salt Approximately seventy
per cent of the human body is made up of water.
One third of this total is found in blood plasma,
digestive secretions, and other body fluids not
contained within individual cells.
These, fluid substances contain an average of 0.9
parts of dissolved salt.
The role of salt in body fluids
 Functions
of salt
Salt controls the amount of water within our
bodies and maintains the critical balance between
cells and body fluids. It also aids in the contraction
of muscle tissue and serves as a vital ingredient
of blood plasma and digestive secretions.
Salt is esseiltial for the maintenance of human
life.
At the same time, it is important to remember that
excessive salt may prove destructive or even fatal.
Modem medical research has shown that a healthy
adult requires an intake of less than ten grammesof
salt per day.
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