The alternating patterns in a woody stem consisting of distinct layers of springwood and summerwood are called Annual Rings.
what is annual ring in woody stem ?
Annual ring is nothing but as a growth ring, visible in the form of Concentric circles in cross-sections of woody stems or trunks.
This ring are the result of cell division of the cambium layer of the woody stem.
It produces a large and thin-walled vessel during spring where as smaller and thick-walled vessel during summer which is a contrasting character of this ring.
It is used to determine the tree's age, and the thickness of the ring indicate the environmental condition during the life of tree.
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