Medulla

Medulla (Latin for "marrow") 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 Medulla, a part of the optic lobe of arthropods Medulla (lichenology), a layer of the internal structure of a lichen Pith, or medulla, a tissue in the stems of vascular plants