I’m so so embarrassed about this one. But I’m going to admit to it. Up until my late 40’s I thought blood is just sloshing around in our bodies. Because if your arm gets cut off, blood pours out. I knew it was in veins but thought it also sloshed around all the gaps and it always puzzled me as to why it doesn’t just fall out of our ears and mouths. So embarrassed but I’ve got that off my chest now.
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