Finish the anatomy and functions of the root system, and view images of the various types of roots. Outline the main functions of the stem, and outline the various types of stems from herbaceous to woody. Discuss the apical growth upward by the stem apical meristem and the growth downward by the root apical meristem. View cross sectional diagrams of the stem and discuss the epidermis, vascular bundles, cortex, pith and cambium layer.