Question

what are medullary rays? what are their functions?

Answer 1

medullary rays are sheets or ribbons extend vertically through the tree perpendicular through growth rings. these are  living cells .

Answer 2

Medullary rays are strips of parenchyma present between vascular bundles of dicot stem. They maintain a living link between the pith and the cortex. The functions of medullary rays are:

● food storage
● deposition of tannins, crystals etc.
● radial transport of food and water
● gaseous exchange through the intercellular spaces.

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