Body Basics
Two minutes a day on how the human body actually works. No medical background needed — start anywhere.
Insulin and blood sugar in plain terms
Every time you eat, your body has to move sugar out of the bloodstream and into cells — and one hormone does most of that work.
Sugar needs a way into cells
After a meal, sugar from digested food enters the bloodstream, raising blood sugar, the amount of sugar circulating in the blood. That sugar is a fuel source, but it can't just drift into most cells on its own — cells need a signal to let sugar in and use it for energy. Without that signal, sugar would stay stuck in the bloodstream instead of reaching the cells that need it.
Insulin is that signal
Insulin is a hormone made by the pancreas that tells cells to open up and take in sugar from the blood, which lowers blood sugar back down toward a normal range. When insulin isn't made or doesn't work the way it should, sugar can build up in the blood instead of moving into cells, which is the basic problem behind diabetes. Understanding that one relationship explains a lot of everyday nursing care around eating, activity, and blood sugar checks.