Question

Define and draw the three major sections of wood.

    Define and draw the three major sections of wood.

Plant Systematics

Plant Systematics

Michael G. Simpson 2nd Edition

Chapter 10, Problem 45

Instant Answer

Solved by Expert Narayan Hari

06/25/2021

Step 1

Wood is a natural composite of cellulose fibers embedded in a matrix of lignin. It is primarily composed of three major sections: the bark, the cambium, and the wood itself, which includes the sapwood and heartwood. Show more…

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Define and draw the three major sections of wood.

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Key Concepts

Bark

Bark is the outer protective covering of a tree that shields it from physical injury, pests, and pathogens. It is composed of dead cells and can have diverse textures and patterns. Although it is not technically classified as wood, it is an integral part of the overall structure of a tree trunk and is often considered when discussing the major sections of a tree cross-section.

Sapwood

Sapwood is the living, outer portion of the secondary xylem that actively conducts water and minerals from the roots to the leaves. It is generally lighter in color than the inner wood and plays a key role in the tree’s physiological functions. The thickness and characteristics of the sapwood can influence the quality and appearance of wood products.

Heartwood

Heartwood is the innermost part of the wood, consisting of older, non-living cells that no longer participate in water conduction. Often darker and denser, heartwood has undergone chemical changes that enhance its strength and resistance to decay. This section is prized in many applications for its durability and aesthetic appeal.

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