The interrelations of the lymphatic capillaries with the nerve structures in the wall of the small intestine]

The character of interrelations of nervous structures and the lymphatic capillary walls has been studied in cats. Under the light microscope twisted nervous fiber terminals of the intestinal neuron dendrites have been revealed around the lymphatic capillaries. Electron microscopical investigation has not revealed any specialized contacts of the nervous terminals and the lymphatic capillary walls. The receptors and terminals of axons do not situate nearer than 10 nm from the latter. According to the structure of synaptic vesicles among the axonal terminals next to the lymphatic capillary walls cholinergic, adrenergic and purinergic ones are described. The influence of the nervous system to the function of the small intestine lymphatic capillaries is mediated via the precapillary space. The neuromediators from the axonal terminals get into it owing to absence of neurolemmocytic membranes around them.