The arteries are the blood vessels that deliver oxygen-rich blood from the heart to the tissues of the body. Each artery is a muscular tube lined by smooth tissue and has three layers:1  The intima, the inner layer lined by a smooth tissue called endothelium.ll rights reserved. The arteries are the blood vessels that deliver oxygen-rich blood from the heart to the tissues of the body. Each artery is a muscular tube lined by smooth tissue and has three layers: 1  The intima, the inner layer lined by a smooth tissue called endothelium.
How much does an ASCBP steel roof weigh? Metal Roofing in general is a very strong, yet lightweight material compared to other roofing products. The 26 gauge metal roofing products weigh between 0.90 â 1.00 lbs.
Materials. The size of each panel may vary from 12 inches to 19 inches, depending on the manufacturer as well as the desired appearance. Materials used in standing seam metal roofing vary. The most common type of material is galvanized steel (G-90), which provides standard protection and durability.