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.
The cost of a metal roof tends to range between $500 a square for lower-end metal material to $1,800 for higher-end copper roofs. The average homeowner usually selects corrosion-resistant metal priced between $700 and $1,000 per square. A natural slate tile roof can cost between $800 and $1,600 per square.