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A person who is under constant stress has chronically high levels of stress hormones in his body. The fact that these elevated hormone levels may eventually damage his arteries is best considered as an example of how stress can impact health by changing
Annual Growth Rings
Concentric rings found in the wood, indicating the age of a tree by representing a year of growth.
Woody Stems
Hard, lignified plant structures that provide support and transport nutrients and water, characteristic of trees and shrubs.
Vascular Cambium
A layer of plant tissue located between the xylem and phloem; it contributes to the growth in stem and root diameter.
Lateral Meristem
Plant tissue located in the stem and root that enables growth in thickness or girth in a maturing plant.
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