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[The possible endocrine function of the cerebral organs of the heteronemertan, Lineus]
Abstract:
In Lineus, the cerebral organs, which are composed of nervous and glandular cells, are surrounded by blood lacunae. However, there is not morphological relation between nervous and glandular cells; the neurosecretory product of some of the nervous cells flows in direction of dorsal ganglions, and the glandular cells are exocrine. The cerebral organs do not constitute neurohemal organs.