| Heartwood | Sapwood |
| $(1)$ In old trees where secondary growth takes place in sufficient amount,the central region is called Heartwood. | $(1)$ The outer region of secondary wood that possesses young xylem cells is called Sapwood. |
| $(2)$ Its cells are filled with tannins,resins,and other substances. | $(2)$ It consists of living cells,vessels,and fibers. |
| $(3)$ It is durable and dark in color. | $(3)$ It is soft and light in color. |
| $(4)$ It provides mechanical strength to the stem. | $(4)$ It is involved in the conduction of water and minerals. |
| $(5)$ It does not conduct water. | $(5)$ It conducts water and minerals and stores food. |
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