After entering the right atrium, the furthest a red blood cell can travel is the superior vena cava.
In 14 steps, blood flows through the heart in the following order: 1) body 2) inferior/superior vena cava 3) right atrium 4) tricuspid valve 5) right ventricle 6) pulmonary arteries 7) lungs 8) pulmonary veins 9) left atrium 10) mitral or bicuspid valve 11) left ventricle 12) aortic valve 13) aorta 14) body.
Learn more about pathway blood circulation: https://brainly.com/question/23160869
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