Related Experiment Video
Updated: Jun 6, 2026

Correlative Confocal and 3D Electron Microscopy of a Specific Sensory Cell
Published on: July 19, 2015
Fine structure of a neuroendocrine complex in the mucosa of the appendix
Abstract:
The fine structure of a neuroendocrine complex within the lamina propria of the human appendix is described. This complex contains four types of neurosecretory cells, occasional neurons, Schwann cells, and numerous nerve processes, including axons with varicose swellings. Few of the axons form true synapses, but many make some junctional contact with the neurosecretory cells and with other nerve processes. From the morphology of their vesicles, most of the nerve fibers appear to belong to the peptidergic component of the enteric nervous system. The mucosal neuroendocrine complex appears to be an integral part of the mucosal nervous plexus.
Related Concept Videos
Assembly of Complex Microtubule Structures
Sympathetic Pathways: Collateral Ganglia and Adrenal Medulla
Collateral Ganglia
Sympathetic preganglionic axons reach the collateral ganglia along the route of splanchnic nerves. These nerves bypass the sympathetic trunk and communicate with sympathetic postganglionic neurons housed in the prevertebral ganglia. These ganglia supply the organs of the abdominopelvic cavity.
The greater splanchnic nerve, formed by the...
Structures of the Endocrine System
Physiology of Enteric Nervous System and Gut Health
Nerve Supply of the GI Tract
The enteric nervous system consists of two major plexuses: the myenteric plexus (Auerbach's plexus) and the submucosal plexus (Meissner's plexus). These plexuses are located within the layers of the GI tract...
Histology of the Small Intestine
The intestinal lining features transverse folds called circular folds, each housing fingerlike projections known as intestinal villi. These villi are covered by a layer of simple columnar epithelium, also referred to as...

