The substance that carries glucose from the small intestine to all other cells in the body is blood.

Here's a breakdown:

* Absorption: Glucose is absorbed from the small intestine into the bloodstream.

* Transportation: The blood then carries this glucose throughout the body, delivering it to cells that need it for energy.

* Delivery: Cells take up glucose from the blood using a specific protein called a glucose transporter.

While blood is the main carrier, it's important to note that insulin plays a crucial role in regulating this process. Insulin is a hormone that helps glucose enter cells.