Capillaries. Capillaries, the smallest and most numerous of the blood vessels, form the connection between the vessels that carry blood away from the heart (arteries) and the vessels that return blood to the heart (veins).The primary function of capillaries is the exchange of materials between the blood and tissue cells.apillaries. Capillaries, the smallest and most numerous of the blood vessels, form the connection between the vessels that carry blood away from the heart (arteries) and the vessels that return blood to the heart (veins).
Class C Operator. Class C Operator of a UST facility is a person designated by the UST system owner who typically. controls the dispensing of fuel at the facility and is responsible for initial response to alarms, releases, spills, overfills or threats to the public or to the environment.
Class C Exam Requirements - To operate vehicles transporting placarded amounts of hazardous materials, or vehicles designed to transport more than 15 persons including the driver with a Gross Vehicle Weight Rating of less than 26,001 lbs, then a Class C license is needed.