Some More Fun Plant Terminology

 A meristem is the tissue in most plants consisting of undifferentiated cells, found in zones of the plant where growth can take place. The meristematic cells give rise to various organs of the plant, and keep the plant growing.


Primary Growth occurs at the apical meristems, where the structure is elongated. Secondary growth occurs at the vascular cambium and cortex cambium, where the structure is increased in width. 


Vascular cambium arises from the primary meristem, the vascular cambium is a part of the morphology of plants. It consists of cells that are partly specialized, for the tissues that transport water solutions, but have not reached any of the final forms that occur in their branch of the specialization graph.


Auxins are a class of plant hormones with some morphogen-like characteristics. Auxins have a cardinal role in coordination of many growth and behavioral processes in the plant's life cycle and are essential for plant body development. The pattern of auxin distribution within the plant is a key factor for plant growth, its reaction to its environment, and specifically for development of plant organs. It is achieved through very complex and well coordinated active transport of auxin molecules from cell to cell throughout the plant body; by the so-called polar auxin transport. Thus, a plant can react to external conditions and adjust to them, without requiring a nervous system. Auxins typically act in concert with, or in opposition to, other plant hormones


Cytokinins are a class of plant growth substances that promote cell division, or cytokinesis, in plant roots and shoots. Cytokinins are involved in many plant processes, including cell division and shoot and root morphogenesis. They are known to regulate axillary bud growth and apical dominance.

Here we have an example of Tropism, the growth movement of a living organism has towards an external stimulus, as you can see the plant is growing in the direction of the light. You're doing great buddy!