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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Why do dogs, bears, raccoons, and even walruses have a baculum—but humans don’t? 🦴In this video, we’re diving into the fascinating evolution of the baculum, why so many mammals have one, and the leading theories for why humans lost ours. Evolution has some pretty strange stories… and this is definitely one of them.#LearnOnTikTok #EduTok #learnontiktokcontest

This video explains heart palpitations, their causes, and natural science-based ways to manage them, including hydration, electrolytes, stress reduction, herbs, and lifestyle changes. Educational | Evidence-based | Heart health #HeartPalpitations #HeartHealth #AnxietyRelief #NaturalHealing #DrNiwat @🌿NIWAT SCIENTIFIC HOSPITAL🌿 @Dr Nimoh English Niwat sci hos @Adwoalilybet