ROOTS
ARE THE UNDERGROUND PART OF PLANTS.They have three main
functions .Firs
t,they anchor the plant in the soil.Second , they
absorb water and minerals from the space between soil
particles ;the roots' absorptive properties are increased by
root hair ,which grows behind the root tips , allowing maximum
uptake of vital substances .Third , the root is the part of
the plant's transport system :xylem carries water and
minerals from the root to the stem and leaves,and phloem
carries nutrients from the leaves to all parts of the root
system.In addition , some roots (e.g carrots)are food stores.Roots
have an outer epidermis covering a cortex of parenchyma(packing
tissue ) and a central cylinder of vascular tissue .This
arrangement helps the roots resist the force of compression
as they grow through the soil.
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