Kid's Growth Explained

I figured sine my boys have been growing so much lately that I would take the time to explain how they are growing. The Meristem is what starts all the growth. The Meristems are regions made of small undifferentiated cells that are capable of cell division and growth in plants. There are two types of Meristems and they control different types of growth. There are the apical meristems which gives rise to the primary plant body, and there are the lateral meristems which are responsible for secondary growth. Primary growth in a plant consists of the everyday growth of a plant. Such as the growth and formation of the primary cortex, primary xylem, and primary phloem. Primary growth also causes the plant to grow taller.  Secondary growth is when the plant grows wider. Secondary growth occurs within a thin layer of constantly dividing cells, called the vascular cambium, which is between the xylem and phloem. The vascular cambium is a group of undifferentiated cells that when they start dividing can be specialized into either secondary xylem or secondary phloem. During secondary growth when the secondary phloem is increasing in thickness, the primary phloem is decreasing in thickness.This forms the cork cambium which is an outer layer of thick tissue. The function of the cork cambium is to direct its undifferentiated cells to become specialized to form cork, a tough outer layer around the plant. Tree bark is an example of cork cambium's handy work. All of this growth has to be controlled by something. All this growth is controlled by hormones. One very important hormone is called auxin. This hormone is responsible for root initiation and growth.It controls the growth of pre-existing roots and branching of the roots. Another very important hormone that works hand-in-hand with auxin is Cytokinin. This hormone is responsible for telling the lateral buds when to grow. It works right with auxin in the fact that they have to be at certain levels for different growth to occur. Yet another very important hormone is Gibberellin. Gibberellin is responsible for regulating growth and also for influencing various developmental processes. Such processes include stem elongation, germination,  dormancy, flowering, and sex expression. This is how my kidos grow.