Anatomy: Dicot Stem

Question

Which tissue arises from vascular cambium during secondary growth contributing to increased stem girth?

RankGuru · Accepted Answer

1. **Secondary Growth**: Result of lateral meristem activity, specifically the vascular cambium.
2. **Cambium Activity**: The vascular cambium is a ring of meristematic cells between the xylem and phloem.
3. **Tissue Production**: It divides and forms:
   - **Secondary Xylem** (wood) toward the inside (pith side).
   - **Secondary Phloem** toward the outside (bark side).
4. **Mechanism**: Because much more secondary xylem is produced than phloem, it is the primary tissue responsible for the massive **increase in the girth** (thickness) of dicot stems and roots.

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Anatomy: Dicot Stem

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