ANATOMY & PHYSIOLOGY A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z                    HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site medulla The innermost part of an organ or body structure. The adrenal medulla is the central region of an adrenal gland, and the medulla of bone is the bone marrow. The term is also sometimes used to refer to the medulla oblongata. Related category    • ANATOMY AND PHYSIOLOGY Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History BACK TO TOP