🗿🗿🗿 | back pain

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

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

High Altitude Sickness: Signs, NCLEX Red Flags, and Priority Actions

If time is paused, the environment instantly becomes uninhabitable because the physical mechanics of the universe require time to function. Because light requires time to travel, suspended photons would never reach your retinas, resulting in absolute blindness. Similarly, sound is a mechanical wave that relies on the physical collision of atoms to propagate; without this movement, the atmosphere remains completely silent. Respiration would also fail, as the kinetic motion of oxygen molecules is

Maldives Diving Tragedy: Investigating Oxygen Toxicity Risks

Vee: Fastest Toon in Dandy's World — Reupload

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