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Zona glomerulosa

Etymology:

Gr. zṓnē: "belt, girdle" + L. glomus: "ball of yarn" or "ball-shaped mass"

Definition:

The most superficial layer of the adrenal cortex, lying directly beneath the adrenal gland's capsule, and responsible for producing and secreting the mineralocorticoid aldosterone into the blood as part of the renin-angiotensin system

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