Final answer:
The heart and blood vessels do play a role in the regulation of fluid and electrolyte balance in the body.
Step-by-step explanation:
The statement 'Heart and blood vessel function in regulation of fluid and electrolyte balance' is true. The heart and blood vessels play a crucial role in maintaining fluid and electrolyte balance in the body. The heart pumps oxygenated blood to all parts of the body, delivering nutrients and removing waste products. The blood vessels, especially the kidneys, help regulate the fluid volume and electrolyte concentrations by controlling filtration, reabsorption, and excretion.