milk is nearly white liquid secreted by the mammary glands of female
mammals for nourishinf their young ones. Milk contains all the
nutrients needed for foods of the adult mammal. Several kinds of
mammals are raised to produce milk for human consumption. Of
these, daily cattle are of greatest commercial importance, but milk is
also obtained from water buffalo, goats, sheep, Camel, reindeer,
mares and other mammals (Harper and Hill, 1986).