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Did you know that a newborn baby has around 270 bones, but an adult has only 206? Where did the other 64 bones go? The answer lies in one of the most fascinating biological processes of the human body. As we grow, many small bones gradually fuse together to form stronger and more stable bones. This happens in the skull, spine, pelvis, and ...
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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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