cortex of thymus

The outer part of a lobule of the thymus. - surrounds the medulla - composed of masses of closely packed lymphocytes Immature thymocytes are produced in the thymic cortex from blood-borne progenitors derived from the bone marrow. The immature thymocytes migrate through the thymic cortex to the medulla, proliferating & differentiating during the migration.

References

Stedman's Medical Dictionary 27th ed, Williams & Wilkins, Baltimore, 1999.