Answer:
The correct order is as follows:
Vena Cava > Right Atrium > Right ventricle > Lungs > Left Atrium > Left Ventricle > Aorta
Explanation:
The circulation of blood in the body of a human is an exact science. One which is critical at that. The blood is one of the body's most crucial and vital internal transportation systems. In an adult human, there are about 25 trillion Red blood cells that take oxygen and energy from the lung and the small intestine respectively but not necessarily simultaneously to every part of the human body.
Restricting our analysis to the boundaries set by the question we can say that the blood circulation starting from the Vena Cava, moves into the Right Atrium depositing oxygen-depleted blood there.
From the Atrium on the right, the blood is transported into the Right Ventricle which is locked by the tricuspid valve when it gets full to stop the blood from returning into the atria.
From this point, the blood is forced through the contractionary action of the right ventricle into the pulmonary artery, through the pulmonic valve, into the lungs.
In the lungs, the blood becomes oxygen-enriched again whilst removing carbon dioxide. This oxygen-rich blood moves from the lungs via the pulmonary veins then the Aorta. This - the Aorta that is, is the largest artery in the human body. The Aorta transports oxygenated blood from the left ventricle to all other parts of the body.
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