Why Flight Attendants Tell You to Put YOUR Oxygen Mask On First 😱

DROP THE #Keyveatz #OXY_GEN #OXY #AOMG | kayveatz member

Jena (@u7ena)’s video of a little bit of oxygen

#🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣 | propane tank expansion

Senku self-made high-pressure oxygen cylinder.#foryou #fyp #anime #drstone #tiktok

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