Saint Louis Science Center (@stlsciencecenter)’s video of heart

Here's exactly what happens every time your heart beats 🫀 It starts with an electrical signal from the SA node — your heart's natural pacemaker. That signal tells your atria to contract, pushing blood down into the ventricles. Then the ventricles contract (ventricular systole): 🫀 Right ventricle → pumps deoxygenated blood to the lungs 🫀 Left ventricle → pumps oxygen-rich blood to the rest of your body After that, the heart enters diastole — a brief relaxation where the chambers refill and pre

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Original Video Credit: IG/acousticpro_ Two different foam panels are placed in front of the same studio monitor to compare how they affect the sound. While both are commonly associated with audio treatment, the difference in what you hear is immediate. The pyramid acoustic foam is designed to absorb sound reflections and reduce echo inside a room, not stop sound from passing through it. The rebonded foam is much denser, giving it far greater resistance to sound transmission and noticeably reduci

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