A capillary hose is a small-diameter tube designed to draw in and transport fluids through capillary action, utilizing the natural tendency of liquids to flow in narrow spaces without the need for external forces like gravity or pumps. This type of hose is commonly used in various applications, including medical devices, scientific instruments, and certain industrial processes. The capillary effect enables precise fluid control and movement, making capillary hoses valuable in situations where accurate fluid delivery or extraction is essential.