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.
1 Metal roofs cost anywhere from $3 per square foot to $20 per square foot or more (or $4,500 to $30,000 for a 1,500 square foot roof). 2  Aluminum roofing costs $6 to $12 per square foot ($9,000 to $18,000).  Steel roofing costs $3 to $10 per square foot ($4,500 to $15,000).