https://en.wikipedia.org/wiki/Medulla
Medulla or Medullary may refer to: . Science. Medulla oblongata, a part of the brain stem; Renal medulla, a part of the kidney; Adrenal medulla, a part of the adrenal gland; Medulla of ovary, a stroma in the center of the ovary; Medulla of the thymus, a part of the lobes of the thymus; Medulla of lymph node; Medulla (hair), the innermost layer of the hair shaft ...