Fact 1: Glucose is used for energy by the cells of most organisms.

Fact 2: Blood Sugar Glucose is sugar.

Given the two facts above, answer the question "Blood sugar is used for energy by what?" with the following options: 
- Veins and arteries.
 - irradiation
 - microorganisms
 - sugar in drinks
 - energizing crowds
 - It helps them survive
 - sugar cereal
 - cells of organisms


 

        cells of organisms 