par Meewis, Henriette 
Référence Cell and tissue research, 69, 1, page (319-325)
Publication Publié, 1966-01
Référence Cell and tissue research, 69, 1, page (319-325)
Publication Publié, 1966-01
Article révisé par les pairs
| Résumé : | In each ganglion of the nerve chain of Eisenia foetida there are several types of neurosecretory cells. They are constant in number and strictly localized. A. Toward the front of the ganglion, the array includes (a) a pair of small cells in the anterior region, and (b) a pair of voluminous elements close to the origin of nerve 2 of the ganglion. These two types of cells are characterized by the presence of secretory granules in the perikaryon and in the axon. B. Between the origins of nerves 2 and 3 of the ganglion, there are (c) a pair of cells possessing a large apical vacuole filled with a secretory material, and (d) a dozen cells distinguished by a dense, highly chromophilic cytoplasm. Only the cells of group (b) are present when the worm emerges from the cocoon. The cells of group (a) appear in the young worm. The cells of types (c) and (d) are only active in worms on their way to sexual maturity. The term "neurosecretory elements", as applied to these different cell types is discussed. © 1966 Springer-Verlag. |
