Do humans have more genes than a banana? with Phillip Ball #shorts #genetics #science #phillipball

This chart shows human brains size over time. They got way bigger, fast. But now they’re shrinking? (No, it’s not the phones!) About 2 million years ago something changed and it altered the course of human evolution. Our brains just started RAPIDLY growing, the organ nearly doubled in size in just a few hundred thousand years. This turning point is what allowed us to evolve into the intelligent species we are today. But now… To learn more, follow along! #evolution #human origins #science

Circulatory System Explained | Blood Flow & Heart Function (Complete Guide)

How Your Circulatory System Works

Human Circulatory System Working Process Explained | Step by Step Blood Circulation Lecture #biology

The Human Heart | How does Heart work – 3D animation

How Electricity Controls Your Heartbeat? | Inside the Human Heart

This is what saves 600,000 people every year during a heart attack. Your heart is running out of time. Every second an artery stays blocked, heart muscle dies — and open-heart surgery isn’t fast enough. That’s why doctors use a coronary stent. A catheter snakes through your wrist or groin to the exact site of the blockage. A balloon inflates, and a tiny metal mesh tube — smaller than your fingertip — locks the artery open permanently. Circulation restored. Heart muscle saved. Patient walking out