[Lymph flow, micro- and macrohemocirculation in the intestine of cats during infusion of serotonin].

In the cat isolated small intestine perfused with a constant flow, i. a. serotonin (0.1--10.0 mu.min-1.kg-1) increased transcapillary fluid transfer against the background of decreasing capillary hydrostatic pressure and increasing capillary filtration coefficient. The reactions of arteries, veins and lymphatic ducts of the small intestine to serotonin were similar: they dilated at low and constricted at high-doses of the amine.