0 the inner part of the adrenal gland that produces adrenaline --
1 the inner part of the adrenal gland that producesadrenaline --
Neuroblastoma and pheochromocytoma are the two most important tumors which arise from the adrenal medulla.
The adrenal medulla is derived from ectodermal cells.
They are concentrated near the adrenal glands and essentially function the same way as the adrenal medulla.
The adrenal medulla is considered a sympathetic ganglion and, like other sympathetic ganglia, is supplied by cholinergic preganglionic sympathetic fibers; acetylcholine is its neurotransmitter.
In the adrenal medulla, acetylcholine is used as a neurotransmitter, and the receptor is of the "nicotinic" type.
At seven weeks of gestation, the adrenal cells are joined by sympathetic cells that originate from the neural crest to form the adrenal medulla.
The neural crest of the ectoderm develops into: peripheral nervous system, adrenal medulla, melanocytes, facial cartilage, dentin of teeth.
These substances are released in the adrenal medulla, which is richly vascular.