part of part of has part has part develops from develops from surrounded by surrounded by contributes to morphology of type II cell of adrenal medulla type I cell of adrenal medulla chromaffin cell of adrenal gland medulla of organ adrenal cortex adrenal medulla http://upload.wikimedia.org/wikipedia/commons/5/5c/Gray1185.png GAID:451 adrenal gland medulla AAO:0011010 chromaffin cells All craniates have groups of cells homologous to the mammalian adrenocortical and chromaffin tissues (medulla), but they are scattered in and near the kidneys in fishes. (...) The cortical and chromaffin tissues come together to form adrenal glands in tetrapods.[well established][VHOG] UMLS:C0001629 The inner portion of the adrenal gland that consists mainly of chromaffin cells which produce, store and secrete neurotransmitters such as epinephrine and norepinephrine. NCIT:C12397 medulla of glandula suprarenalis UBERON:0001236 MAT:0000495 suprarenal medulla medulla of suprarenal gland SCTID:362585001 medulla (glandula suprarenalis) medulla glandulae suprarenalis CALOHA:TS-0018 adrenal central medulla FMA:15633 EV:0100137 MA:0000119 VHOG:0001378 EMAPA:18428 BTO:0000049 MESH:D019439 XAO:0000166 EFO:0000852 Wikipedia:Adrenal_medulla medulla of adrenal gland neural crest adrenal gland neural crest-derived structure