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what is the transportation of food from leaves to all other parts of the plant is known as?
The phloem tubes through which nutriments are carried by are made up of two different kinds of cells. These are the sieve cells, through which the nutrients are transported, and the companion cells. Both these cells are elongated, and completely different in structure to the cells in the xylem tubes. This difference can be clearly appreciated when their structure is examined. Both the cells in the phloem system have extremely thin walls. They are also living cells. Those in the xylem tubes are dead.


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