Surfactant: A fluid secreted by the cells of the alveoli (the tiny air sacs in the lungs) that serves to reduce the surface tension of pulmonary fluids; surfactant contributes to the elastic properties of pulmonary tissue, preventing the alveoli from collapsing.urfactant: A fluid secreted by the cells of the alveoli (the tiny air sacs in the lungs) that serves to reduce the surface tension of pulmonary fluids; surfactant contributes to the elastic properties of pulmonary tissue, preventing the alveoli from collapsing.
Guy Fawkes' Day is not a public holiday. Businesses, organizations and schools are open as usual. Public transport services run to their normal timetables. Some organizations, communities and municipalities may organize public bonfires or displays of fireworks on or around November 5.
In 2015 Labour Day is Monday September 7. Labour Day in Canada is celebrated on the first Monday of September and it is a federal statutory holiday. It is also observed in the United States on the same day.n 2015 Labour Day is Monday September 7. Labour Day in Canada is celebrated on the first Monday of September and it is a federal statutory holiday. It is also observed in the United States on the same day.