The active muscles, such as the legs and thighs, are full of blood vessels. These blood vessels contain myoglobin (or muscle hemoglobin), which delivers oxygen to the muscles. The more myoglobin the muscles contain, the darker the muscle. Scientists often refer to these active muscles as slow-twitch fibers.
Background. Beef jerky is a type of snack food that is made by marinating beef in a curing solution and drying it. Meat treated in this way has a long shelf life and a unique flavor. Invention of this meat processing technology is attributed to Native Americans who smoke-dried meat to preserve it.
What are paper clips made out of? A: Most paper clips are made out of galvanized steel wire, which is made from iron, carbon and zinc. In a fast process, galvanized wire is fed off a spool into a machine and transformed and bent as it passes through. Continue Reading. Hundreds of paper clips are created per minute in paper clip-making machines.