Booktok's Reaction to Oxygen & Flight Attendants

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

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

The Ending Nobody Saw Coming

Everyone Was Wrong

The Ultimate Football Icon 🇧🇷👑 | #football #ronaldinho #edit #shorts

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 Helium Causes Oxygen Deprivation 😨 Surgeon Reacts