From the right atrium through the tricuspid valve to the through the valve to the pulmonary trunk to the right and left to the capillary beds of the to the to the of the heart through the valve, to the through the semilunar valve, to the to the systemic arteries, to the of the body tissues, to the systemic veins, to the and which enter the right atrium of the heart.

Circulatory system

Explanation:

From the right atrium through the tricuspid valve to the right ventricle through the pulmonary sigmoid valve to the pulmonary trunk to the right and left lungs to the capillary beds of the pulmonary veins to the left atrium to the left ventricle of the heart through the mitral valve, to the aorta through the aortic semilunar valve, to the whole body, to the systemic arteries, to the capillaries of the body tissues, to the systemic veins, to the superior cava vein and inferior cava vein, which enter the right atrium of the heart.

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs