Chapter 33 - The Plant Body - 33.3 - Meristems Build a Continuously Growing Plant - 33.3 Recap - Learning Outcomes - Page 731: 3

The vascular cambium is a layer of tissue made mostly of elongated cells that divide frequently. It supplies the cells of the secondary xylem and secondary phloem. When these vascular tissues die, they become wood and bark, which thickens the body of the plant.

The vascular cambium is a layer of tissue made mostly of elongated cells that divide frequently. It supplies the cells of the secondary xylem and secondary phloem. When these vascular tissues die, they become wood and bark, which thickens the body of the plant.