english: The reason blood is so incredibly efficient is that our red blood cells are not dedicated to specific organs or tissues; otherwise, we would probably have traffic jams in our veins.
non_english: Razlog zbog kog je krv tako neverovatno efikasna je taj što naša crvena krvna zrnca nisu privržena određenim organima ili tkivima; u suprotnom bismo verovatno imali zastoje u svojim venama.