Explaining Biology on Instagram: "Biology doesn’t have to be confusing or boring. Sometimes, all it takes is a simple visual to make complex concepts finally click. Biological valves are found throughout the human body—inside veins, the heart, and other systems—working silently to ensure blood and fluids flow in the right direction. These valves open when pressure moves forward and close instantly to prevent backflow, protecting the body from serious complications. This quick demonstration shows

Nature Animals Plants Geography on Instagram: "Follow @explainingthewild for the best nature, animal, planet, and geography content 🧠⚙️ A beaver’s teeth are a marvel of biological engineering, specifically designed to act as high-performance self-sharpening chisels. The most striking feature is the bright orange color of the front enamel, which is caused by a high concentration of iron. This iron-rich layer is incredibly hard and decay-resistant, while the white dentin behind it is much softer.