[Embryonal development and the structure of the intermesenteric plexus in humans and various mammals]

The intermesenteric plexus is an independent formation, it is connected with other plexuses in the abdominal and pelvic cavities and participates in innervation of organs. In the species investigated (mole, rat, cat, dog, man) connections between the intermesenteric and other vegetative plexuses in the abdominal and pelvic cavities vary according to their amount and complexity, they are most abundant and complex in man. In the latter the plexus is also mostly rich in neuro-fibrillar and neuro-cellular elements. In the intermesenteric plexus of the man and the animals studied there is a rather big part of vegetative ganglia, which can be considered as peripheral centers of the internal abdominal organs innervation.