@instituteofhumananatomy: Here's why adrenaline is slower than your nervous system — and a heart transplant fact that will blow your mind. 🧠 Your sympathetic nervous system fires in milliseconds through direct nerve connections. Adrenaline takes 30-60 seconds to travel through the bloodstream to the same organs. Heart transplant patients have those direct nerve connections to the heart cut during surgery. So when they're scared? Everything fires — sweat, pupils, flushed skin — but heart rate stays steady. Then 30-60 seconds later, adrenaline finally arrives and the heart rate climbs. Same delay happens during exercise. Your anatomy never stops being incredible. Part 3 covers chronic stress and long-term damage. Follow for more anatomical awesomeness! 👉 #anatomy #humanbody #stress #adrenaline #fightorflight #hearttransplant #humananatomy #nervoussystem #bodyscience #anatomyeducation #didyouknow #learnontiktok

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Wednesday 18 March 2026 00:00:00 GMT