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Morphological and ultrastructural study of the ventral nerve cord in Branchiobdella pentodonta whitman (Annelida, oligochaeta)
Author(s) -
Vagnetti Daniela,
Farnesi Rosalba Maria
Publication year - 1978
Publication title -
journal of comparative neurology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.855
H-Index - 209
eISSN - 1096-9861
pISSN - 0021-9967
DOI - 10.1002/cne.901780210
Subject(s) - neuropil , ventral nerve cord , biology , anatomy , spinal cord , dorsum , ultrastructure , cord , oligochaeta (plant) , neuroscience , central nervous system , zoology , mathematics , geometry
The ventral nerve cord of Branchiobdella pentodonta consists of paired ganglia containing three different types of neurons, a central neuropil showing characteristic synapses and of an intersegmental apparatus made up of two large lateral connectives and a smaller ventral one. Some remarkable differences exist between the ventral nerve cord and that found in other oligochaetes; these include the presence of a large dorsal blood vessel, two dorsal muscular cells per metamere, and supportive glial cells ventral to the neuropil which have long transverse processes coming into contact with the segmental nerves.