木质部

Protoxylem The PRIMARY XYLEM elements that are formed from the procambium first.

初生木质的成分，最早由原形成层形成。

Actinostele A rype of protostele in which the xylem is star shaped and the phloem lies between the points of the star.

原生柱的一种类型。木质是形的，韧皮形之间。

These cells began to devise, then developed into aloin cells through enlargement of volume and vacuolization with the differentiation of metaphloem and metaxylem.

在后生韧皮和木质发育成熟，这些细胞体积逐渐增大，并液泡化，发育成为大型薄壁细胞（芦荟素细胞），筛管外侧。