The regulation of blood sugar is primarily accomplished by the pancreas.

Here's how it works:

* Insulin: The pancreas produces the hormone insulin, which helps lower blood sugar levels by allowing cells to absorb glucose from the bloodstream.

* Glucagon: The pancreas also produces the hormone glucagon, which raises blood sugar levels by stimulating the liver to release stored glucose.

Together, insulin and glucagon maintain a delicate balance of blood sugar levels, preventing both dangerously high and low levels.