The neurohemal organs and the endocrine glands of pachygrapsus marmoratus fabricius decapoda brachyura i. the neurohemal organs the sinus gland and the pericardial organs
Crustaceana 55(1): 71-87
ISSN/ISBN: 0011-216X Accession: 006724310
Two types of neurohemal structures, the sinus gland and the pericardial organ, are described in the crab Pachygrapsus marmoratus. The sinus gland, associated with the optic lobes, is bounded by a stromal sheath and consists of clusters of axonal endings filled with four kinds of electron-dense granules, as well as of glial cells. The pericardial organ consists of axonal endings filled with four other kinds of electron-dense granules. In both structures, the mechanism of hormone release is linked with exocytosis and synaptic vesicles.