CHANGES IN THE VASCULAR PARENCHYMA OF THE LUNGS RUSLI DURING EXERCISE IN HIGH ALTITUDE CONDITIONS
Changes in the branches of the pulmonary artery in rats in a state of relative physiological rest pass through two stages in the process of individual adaptation within 15 days. The first is characterized by a decrease in lumen and thickening of the vascular wall as a result of a decrease in reflex spasm and edematous phenomena. Physical activity enhances the compensatory-adaptive mechanisms of the body with a lack of oxygen consumption in high altitude. In combination with edematous phenomena, the wall of the pulmonary artery becomes sharply thickened at the first stage. In the second stage, tissue mechanisms are activated to meet oxygen consumption. Therefore, the load on the right side of the heart and on the pulmonary vessels reduces the edematous phenomena, the wall thickness in the branches of the pulmonary artery is reduced compared with the data of the first stage.