You can also reach there webite www.rotech.com and can get required information regarding to . If you as a customer of the Rotech have any query, complaint, suggestion, feedback and reviews related to Rotech products and services then you can communicate through its customer service detail.
As in the arteries, the walls of veins have three layers, or coats: an inner layer, or tunica intima; a middle layer, or tunica media; and an outer layer, or tunica adventitia. Each coat has a number of sublayers.
All arteries and veins contain three layers. The innermost layer is called the tunica intima. The muscular middle layer is called the tunica media, and the outermost layer is called the tunica adventitia. Because capillaries are only one cell layer thick, they only have a tunica intima.