Examples of homeostasis include the regulation of body temperature, the pH of extracellular fluid, or the concentrations of sodium, potassium and calcium ions as well as that of glucose in the blood plasma, despite changes in the environment, diet, or level of activity.
Blue-collar workers perform labor jobs and typically work with their hands. The skills necessary for blue-collar work vary by occupation. Some blue-collar occupations require highly skilled personnel who are formally trained and certified.
As dependable as the steel. The blue-collar work ethic is as strong as the buildings they erect with steel beam supports. They know the very foundations these building are built upon are analogous to the foundations of the country we live in. Further, they know that if they choose to not show up to work, it simply doesn't get done.