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medulla US English

The inner region of an organ or tissue, especially when it is distinguishable from the outer region or cortex (as in a kidney, an adrenal gland, or hair)

medulla oblongata US English

The continuation of the spinal cord within the skull, forming the lowest part of the brainstem and containing control centers for the heart and lungs

adrenal medulla in adrenal US English

Of, relating to, or denoting a pair of ductless glands situated above the kidneys. Each consists of a core region (adrenal medulla) secreting epinephrine and norepinephrine, and an outer region (adrenal cortex) secreting corticosteroids