Question

In order to move molecules in your kidneys or in your blood your body needs

Answer 1

In order to move molecules in your kidneys or in your blood your body needs energy

ANSWER: ENERGY

Answer 2

I agree with Lilly and in order to get that energy you will need food. In order to digest that food you with need your organ system and in that organ system is the digestive system which brings the nutrients to the circulatory system which includes the heart and blood vessels and arteries.