If you are reading this ... over TWO 2-Liter bottles of coke's worth of blood has pumped through your heart in the past minute! Yeah. It's kind of a big deal.
heart's in the middle.
lungs on the sides.
on top, that's blood being pumped to your head and arms and upper half.
on the bottom, blood being pumped to your lower half.
oxygenated blood in red. de-oxygenated blood in blue.
part of a biology/natural history series I'm thinking about doing.
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