16/01/2026
Did you know that an adult human heart is approximately the size of a fist, and weighs about 250g?
❤It beats around 100,000 times per day.
⌚️A normal adult resting heart rate is between 60 to 100 beats per minute.
🪟The heart has four chambers; two upper chambers called the atria, and two lower chambers called the ventricles.
🩸The right side of the heart pumps blood to the lungs, where it picks up oxygen. The left side pumps oxygen-rich blood to the rest of the body.
🔃Heart valves ensure that blood flows in the right direction.
⚡️The heart has its own electrical conduction system. In some types of cardiac arrest, the heart's own conduction system has become chaotic and disorganised.
P.S. For comparison, the heart model on the left, is that of a Thoroughbread horse 🐴 🤯