There is no organ that makes sugar, necessarily. The organ that releases sugar, or helps with sugar absorption, is the pancreas. If this isn't working properly, it can result in blood sugar problems.
Pancreas
liver
what makes an organ system
Well actually, a cell makes up tissue. Then the tissue makes up an organ, the organ makes the organ system, then the organ system makes up an organism. But the exact amount of cells in an organism is unknown, but it is estimated to be 100 trillion.
respitory, digestive, and circulatory =
Insulin is produced in the pancreas, but it affects every organ in the body. All organs metabolize sugar, and sugar metabolism is regulated by insulin.
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the liver
pancreas
It is a organ
Not an organ, every cell in the body produces sugar. The organelle in a cell that makes the ATP [which is later turned to sugar by other chemicals] is the mitochondria in animal cells. In plant cells it's this and the chloroplasts.
the sugar in it