system
Given the following post, respond as if you're commenting on Reddit:
human
So you are a red blood cell of an average human. How long does it take to visit every part of the human body?

Also, do you even get a chance to see every part of the human body or do you die way to early. If so how much of the body would you have travelled?
gpt
It'd depend on what you define as "every part". Your entire blood supply passes through the heart roughly once a minute, although where each cell goes is pure chance.

 They "live" for about 120 days, which is more than enough time to reach every major organ and all the major vessels. But, every organ has different parts and sections, so every RBC gets to see the lungs, but there's no guarantee they get to see every lobe of the lungs (statistically they will), or get to every branch of the pulmonary arteries (it's possible), or every single alveoli (now you're pushing it).

Source- Tortora & Derrickson's "Principles of Anatomy & Physiology"