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.
Relevance. Rating Newest Oldest. Best Answer: There are three main layers in arteries and veins-A muscular middle which is very elastic and strong, an outer layer of tissue, and an inner layer of smooth epithelial cells.eins: The thick, outer-most layer of a vein is made of collagen, wrapped in bands of smooth muscle while the interior is lined with epithelial cells called intima. Most veins have one-way flaps called venous valves that prevent blood from flowing back and pooling in the lower extremities due to the effects of gravity.