deoxygenated
The renal vein carries deoxygenated blood from the kidneys to the heart.
The right side pumps deoxygenated blood and the left side pumps oxygenated blood.
It depends on what kind of control you are talking about. Blood vessel walls keep the blood traveling in the right path. Valves in the heart and veins keep it moving in the right direction in each vessel. The spleen and kidneys filter and remove impurities and waste products. The intestines add nutrients to be carried to the various body cells. The lungs add oxygen to be carried to the various body cells.
oxygenated blood
The renal artery carries blood to the kidney, and the renal vein carries blood that has been purified by the kidney.
The right side of the blood receives deoxygenated blood from the systemic (body) circulation. The right atrium receives blood from the systemic veins and pumps it into the right ventricle. At that point, the right ventricle pumps that blood to the lungs.
deoxygenated blood
oxygenated blood so that the heart can then pump it out to the body
The heart pumps oxygenated blood to the body.
The vein carries your normal blood throughout the human body.
Oxygen.
It is very simple There are many tubes that go in and out of the heart. I can't remember their names but I know that there are 4. Two are on the right and two are on the left. They transport blood to and from the heart. It moves in a kind of circular movement. Blood gets pumped and leaves the heart and then returns when it is deoxygenated and not usable. It sounds tough but is really easy to understand!