Respuesta :

Carbohydrates contain glucose (blood sugar), the main fuel of the body. The nervous system, including the brain use only glucose for energy. Fats contain a fuel called fatty acids, and they are used by the muscles and heart.

Carbohydrates contain glucose (blood sugar), the main fuel of the body. The nervous system, including the brain use only glucose for energy. Fats contain a fuel called fatty acids, and they are used by the muscles and heart.