exÂ·peÂ·dite. (Äkâ²spÄ­-dÄ«tâ²) tr.v. exÂ·peÂ·ditÂ·ed, exÂ·peÂ·ditÂ·ing, exÂ·peÂ·dites. To speed up the progress of or execute quickly: expedite the review of a legal case; expedite a loan application.
The cortex, composed primarily of parenchyma cells, is the largest part of the primary root, but in most dicots (eudicots) and in gymnosperms that undergo extensive secondary growth, it is soon crushed, and its storage function assumed by other tissues.
Root growth begins with seed germination. 1  When the plant embryo emerges from the seed, the radicle of the embryo forms the root system. The tip of the root is protected by the root cap, a structure exclusive to roots and unlike any other plant structure.