The spontaneous contractile activity of isolated lymph nodes and the lymph flow from intestine lymphatic vessel in antiorthostatic posture of rats with an inclination angle of 30 degrees during 7-14 days, was decreased. Contractions of the rat lymph nodes in response to actions of adrenaline, acetylcholine and histamine were diminished. There are changes of biochemical components of lymph and blood plasma with simultaneous decrease of the blood plasma volume. It is concluded that the lymphatic system on antiorthostatic posture plays the compensatory role with the purpose of stabilization of homeostasis in the brain.
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