Nutrition is the process by which the body breaks down substances and gets energy from food.
The *heart* is the main organ of the circulatory system.
The circulatory system consists of three independent systems that work together: the heart (cardiovascular), lungs (pulmonary), and arteries, veins, coronary and portal vessels (systemic). The system is responsible for the flow of blood, nutrients, oxygen and other gases, and as well as hormones to and from cells.
Constant variables are variables that are kept the same in all groups during an experiment.
Answer:
wax
Explanation:
wax dissolves than others
