Bio_medicine on Instagram: "This happens because arterial blood flow is pulsatile—each heartbeat creates a pressure wave that pushes blood out in rhythmic spurts. When a small finger wound nicks an artery and is submerged in water, the blood diffuses in visible pulses, mimicking a waveform like an arterial pressure trace. It's not an actual EKG but shows the heart's mechanical rhythm Note: For educational purposes only DM for credit or removal #ekg #ecg #ecgmachine #hearthealth"