Certain undergraduate coursework may be required, but each program will differ. You can expect a speech pathology program to take approximately two years to complete. While in school, some of the course topics you may cover include: Cognition and neural bases; School-age language disorders; Hearing screenings; Speech pathology diagnoses
Plant Roots: The root system of a plant constantly provides the stems and leaves with water and dissolved minerals. In order to accomplish this the roots must grow into new regions of the soil. The growth and metabolism of the plant root system is supported by the process of photosynthesis occurring in the leaves. Photosynthate from the leaves is transported via the phloem to the root system. Root structure aids in this process.
How do roots grow? Tree and shrub roots require oxygen and water to grow. Their growth rate is variable and is affected by the soil depth, water supply, aeration, mineral supply and temperature. Root systems are made up of large, permanent roots for support and stabilization, and many small, temporary feeder root and root hairs. These small roots are the primary water and nutrient absorbers. Most roots can be found in the top 6 to 18 inches of soil, where water, nutrients and oxygen are found. Roots generally extend up to two or three times the height of the tree, but can extend as far as seven times the height of the tree.