medullae
Medullae is the plural form of medulla, a term used in anatomy to denote the inner part or core of an organ, as opposed to its outer layer or cortex. The word comes from Latin medulla, meaning marrow or innermost part. In physiology and anatomy, medullae are identified in several organs where the inner region has distinct structure and function.
Medulla oblongata is a well-known example in the brainstem. It lies above the spinal cord and contains
Renal medulla refers to the inner portion of the kidney, surrounding the renal papillae and renal pelvis.
Adrenal medulla is the inner region of the adrenal gland, composed of chromaffin cells that secrete catecholamines
In bones, the term is encountered in reference to the medullary cavity, the central marrow-containing space
Across contexts, medullae denote inner, often functionally specialized regions that differ from outer cortical or surrounding