Page 18 - Herlihy: The Human Body in Health and Illness, 3rd Edition

Brief description: phosphorus is commonly
misspelled "phosphorous". It is an essential
component of living systems and is found in
nervous tissue, bones and cell protoplasm.

30

Brief description: zinc-deficient animals
require 50% more food to gain the same
weight of an animal supplied with adequate
amounts of zinc. Zinc is not particularly
toxic and is an essential element in the
growth of all animals and plants