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.
In eudicots, the first root to form is the primary root. It grows straight down and is the dominant root, also known as a taproot. The taproot can produce lateral roots that grow out to the sides. Common eudicots include tomato plants, roses, maple trees, oak trees, and raspberry bushes.he lateral meristems that produce secondary growth are called cambiums, which just means a tissue layer that adds to plant growth. The two important ones for secondary growth are the vascular cambium and the cork cambium.