Anatomical term for the inner region of an organ, such as the renal medulla or adrenal medulla. Often contrasted with 皮質 (cortex).
See also: 皮質
The renal medulla is involved in concentrating urine.
Adrenaline is secreted from the adrenal medulla.
adrenal medulla
From 髄 (marrow, pith) and 質 (substance, quality). The term is a direct anatomical borrowing from Chinese, corresponding to the concept of medulla.