Hello there!
The red blood cell will travel from the coronary artery to the aorta in the following way:
Coronary artery, cardiac vein, right atrium, tricuspid valve, right ventricle, pulmonary semilunar valve, pulmonary artery, lungs, pulmonary vein, left atrium, mitral valve, left ventricle, aortic semilunar valve, aorta.
Let me know if you have questions about the answer. As always, it is my pleasure to help students like you!