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

How Trigonometry Builds Precision Machines!

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This is how I make my soy pickled jalapeños and onions, or jangajji.

V8 Engine Model Kit Assembly and First Start — Part 01

Amplify your strength with a pulley system! #shorts #pulley #mechanical