I was just stairing at that GIF of the beating heart for like 10 minutes! In total amazement at how I have one of those inside my chest, and its been working nonstop almost 30 years since it first started while I was still in the womb! the heart is an amazing organ! Incredily simple too how muscle contractions and its shape can just allow it to act as such a perfect pumping system! The design of the human body seems like a mix of art and technology!
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i loved this comment about you staring at the heart for ten minutes.