Name the type of blood vessels which carry blood from various organs to the heart.

Veins and arteries are the two different types of blood vessels. The blood vessel known as an artery is responsible for transporting blood from the heart to various body parts.

Veins are blood vessels that carry blood from the body's tissues back to the heart. The pulmonary vein from pulmonary circulation carries oxygenated blood to the heart while veins of systemic circulation return deoxygenated blood to the heart. The veins are equipped with one-way valves that prevent the backward flow of blood and ensure that it is efficiently returned to the heart for oxygenation and recirculation. The veins play a crucial role in the circulatory system, and malfunction or disease of the veins can lead to various health problems.