BioCoach Activity

Concept 16: Structure of Woody Stems

In woody stems, the periderm, secondary xylem, and secondary phloem take over the function of the epidermis, primary xylem, and primary phloem.

The periderm consists of cork tissue and cork cambium. The photomicrograph below shows part of the cross section of a young woody stem.

See if you can find each of the tissues listed to the right of the image. To practice or to check your understanding, click on one of the buttons below.

Study Primary Tissues Study Secondary Tissues