If there is excess sugar in the blood, which organ is this excess excreted in?

Carbohydrates, after being absorbed in the intestines, enter the bloodstream. Here they are used as energy for muscles, nerves, for the work of all cells. If there is too much sugar, then its excess is stored in large quantities in the liver and a little in the muscles as part of glycogen. Glycogen is a complex carbohydrate, each molecule of which is made up of several glucose (simple sugar) molecules. Also, excess carbohydrates can be converted to fats and accumulate in the subcutaneous fat layer. These stores will be used up if your blood sugar drops.