The inner wall of the vesicle (region of closure) is frequently thickened to form a so-called " sensecushion," apparently a ganglionic offshoot from the sub-umbral nerve - ring.
At the posterior end of the body there are likewise seven separate ganglia partially fused to form a single ganglionic mass, which innervates the segments lying behind the anus and corresponding to the posterior sucker.
Ganglia, rather than cord-like nerve- br', Parabranchia (= the tracts containing both nerve-cells or comb-like osphra ganglionic elements and nerve-fibres.
The nervous system of the embryonic head exhibits three ganglionic masses, anterior to the thoracic ganglionic masses; these three masses subsequently amalgamate and form the sub-oesophageal ganglion, which supplies the trophal segments.
The muscular walls of the rhynchocoel, which by their transverse contractions serve to bring about eversion of the proboscis in the way above traced, are attached to the musculature of the head just in front of the ganglionic commissures (fig.
How would you define ganglionic? Add your definition here.