4) digestive and circulatory, because the bladder is part of the digestive system. The circulatory system carries blood around the body using blood vessels.
Flex to the moon and back
When an electron<span> moves from </span>one atom<span> to </span>another<span>, </span>both atoms become<span> ions.</span>
Molecules with similar shapes have similar biological effects, because shape (structure) dictates effects (functions).
They aren’t common denominators
