Presently, their focus rested on finding a substitute for blocked cardiac blood vessels; they were mere tenths of a micromillimeter in diameter!

These slender vessels couldn't be detected without the aid of a mirror. Their fragility and minuscule dimensions rendered finding a viable replacement a daunting task.

They weren't totally lost for ideas, however; they'd gleaned some insight from the Leaves.

Every verdant leaf, vibrant with Life, revealed a web-lLike network of microtubes-a botanical tapestry resembling the intricate microvascular system within the human body.

Harnessing this natural phenomenon, they embarked on their quest.