Is the ability of the heart, blood vessels, blood, and respiratory system to supply oxygen to the muscles during sustained exercise.

Which statement best describes the way this interaction affects the plot? nora and doctor rank have to find a way to hide their love for each other from helmer. doctor rank's admission of love prolongs the suspense because now nora cannot ask him for . nora and doctor rank have to keep the extent of his illness a secret from helmer later. now that doctor rank has expressed his love for nora, he can no longer come to the house.