Primary Growth Anatomy

Botany professor Dr. Joyce Onyenedum takes viewers on a guided tour of primary growth in plant shoots, the developmental foundation of plant structure. This video focuses on constructing the vegetative shoot system—the aboveground, non-reproductive portion of a plant responsible for structural support and photosynthesis. Through anatomy, development, and evolutionary examples, the video explains how stem cells in the shoot apical meristem generate tissues, organs, and diverse vascular arrangements that shape plant form. Topics covered: 00:00 The vegetative shoot system 00:54 The shoot apical meristem (SAM) 01:25 SAM organization: Tunica–corpus model, Cytohistological zonation, Primary meristems 03:49 Stelar anatomy: construction of vascular tissues 04:49 Extreme shoot anatomy: medullary bundles 05:43 Extreme shoot anatomy: rope-like stems 06:15 Recap