Why don't trees get tired holding their limbs out for a hundred years? Why can a single African Violet leaf produce a dozen identical new plants? Any why don't plants bleed to death when their leaves fall off naturally? Descriptions of the plant parts too small to see without magnification provide the answers. The plant's cells and their several specialised working subunits are examined in addition to chemical traits like colour, scent, and the hormonal effects that turn leaves toward the light and allow other adaptations to the surroundings.