The center of a tree or shrub stem (from roots to trunk, branches, and twigs) is woody, composed of xylem cells that conduct water from the roots to the upper parts of the tree. That woody section is ...

Plants—they’re just like us! Well, not exactly, but they do have skin and hair like us…even if they also have creepy little alien mouths. In this episode of Crash Course Botany, we’re getting up close ...