Process control systems in a chemical plant or oil refinery maintain fluid levels, pressures, temperature, chemical composition, etc. by controlling heaters, pumps and valves. [citation needed] The centrifugal governor of a steam engine, as designed by James Watt in 1788, reduces the throttle valve in response to increases in the engine speed, or opens the valve if the speed falls below the pre-set rate.
Collagen is made from dietary proteins. As a structural protein, collagen builds connective tissues found throughout your body. While it's essential for tendons and ligaments, collagen does much more than that: It supports soft tissues such as organs, gives resilience to bones and keeps your skin firm. It can fill such diverse jobs thanks to a chain-like structure that can form long filaments and crisscross into sheets of connective tissue.
Updated November 30, 2016. Collagen is a protein made up of amino acids that is found in the human body. Here's a look at what collagen is and how it is used in the body. Like all proteins, collagen consists of amino acids, organic molecules made from carbon, hydrogen and oxygen.