xylem plant_anatomy portion of xylem tissue (exact) PO:0005352 木質部 (Japanese, exact) A portion of vascular tissue (PO:0009015) that has as part one or more tracheary elements (PO:0000290). Functions in the translocation of water and solutes from roots (PO:0009005) to the shoot system (PO:0009006) and in support. Tracheary elements have lignified cell walls with secondary thickening and are dead at maturity. PO_GIT:434 xilema (Spanish, exact) portion of vascular tissue hydrome