Question: what are the three zones of the adrenal cortex?
Answer: The adrenal cortex comprises three zones, or layers: Zona glomerulosa (outer), Zona fasciculata and Zona reticularis. The outermost layer, the zona glomerulosa, is the main site for production of mineralocorticoids, mainly aldosterone. Zona fasciculata is the layer situated between the glomerulosa and reticularis.