Question

list the path of a blood cell from the superior vena cava as it makes its way through the heart. begin with the first structure a red blood cell will encounter as it leaves the vena cava at the top of the list.
instructions
aorta
right atrium
left ventricle
right ventricle
pulmonary trunk
left atrium

Explanation:

Blood from the superior vena cava enters the right atrium. Then it goes to the right ventricle. From the right ventricle, it moves to the pulmonary trunk (for pulmonary circulation). After oxygenation in the lungs, blood returns to the left atrium, then to the left ventricle, and finally is pumped out through the aorta.

Answer:

Right atrium, Right ventricle, Pulmonary trunk, Left atrium, Left ventricle, Aorta