AcknowledgmentsIntroduction: What Is "Microfluidics"?Part I A World of Droplets1: The Liquid Pearls of Mother Nature: The Microfluidics of Rainbows, Clouds, and Other Aerosol Phenomena-and How Droplets Are Affected by Humidity, Surfaces, and Diffusion2: The Drops of Life: The Role of Surface Tension in Everyday Life-and Biotechnology3: Healing Mists: The Breakup of Jets into Sprays and Their Use in the Treatment of Tuberculosis and Asthma4: Mercedes' Droplets: How Sprays Revolutionized Combustion Engines, from Carburetors to Fuel Injectors5: This Olive Is Not an Olive: Similarities in the Use of Droplets in Gastronomy and Genomics6: Industrious Droplets for an Industrial Era: The Airbrush Paint Device, the Inkjet Printer, and Their Cousin the 3D PrinterPart II Wick It Up7: The Plants of Progress: Capillary Action in Plants, the Drop-by-Drop Extraction of Useful Juices from Certain Trees, and Autonomous Capillary Microfluidic Devices8: Trickling Sand: The Microfluidics of Acequias, Aquifers, and Paleolithic Caves, Next to Microfluidic Models of Sand for Worms9: Nadal's Sweat: The Microfluidics of Sweat-Based Cooling, Our Various Glands, and Wearable Sweat Sensors10: The Flame of Microfluidics: The Capillary Action That Powers the Candle Wick and the Impact of Candles and Oil Lamps11: The Magic of Paper: The Capillary Action That Draws Ink out of Various Writing Devices into Paper12: The Man Who Wore a Sanitary Pad: The Revolution in Women's Health Care Brought About by Inexpensive Pads and Home Pregnancy Tests, Both Powered by MicrofluidicsPart III Going with the Flow13: Dirty Blood: The Amazing Microfluidics of the Kidney, Kidney Dialysis, Hypodermic Needles, and Mosquitos14: The Sensor That Saved Jeff's Feet: Microfluidic Glucose Sensors for Diabetics and Point-of-Care Blood Analyzers15: Every Breath We Take: The Microfluidic Organs That Breathe for Us and the First Lung-on-a-Chip16: The Sounds of Microfluidics: From the Tiny, Fluid-Filled Ancient Circuits of Our Hearing and Balance to the Simplicity of Ultrasound-Powered Chips17: The Microfluidic Race against Cancer: Circulating Tumor Cells, the Microfluidic Circuits of the Lymphatic System, and the Circulating Tumor Cell Chip18: The Innocence of DNA: The Microfluidic DNA Sequencing Chips and Their Impact on SocietyGlossary.