EXTRACELLULAR MATRIX. The extracellular matrix of connective tissue is composed of ground substance and fibers. In ordinary connective tissue, the ground substanc e consists mainly of water. The principal fiber type is collagen (the most abundant protein in the body), with elastic fibers as a minor element.The extracellular materials which comprise the matrix are produced by fibroblasts.n ordinary connective tissue, the ground substanc e consists mainly of water. The principal fiber type is collagen (the most abundant protein in the body), with elastic fibers as a minor element. The extracellular materials which comprise the matrix are produced by fibroblasts.
Major airlines require more flight hours and experience from pilots than that demanded by commuter and regional airlines. As of 2012, the salary range for regional airline pilots was $16,500 to $60,000, according to AvScholars, an organization that guides would-be aviators in education and career.
According to the Bureau of Labor Statistics, more than 68,000 airline pilots, copilots and flight engineers were employed in the United States as of May 2011. They earned a mean annual salary of $118,070. The median salary, or halfway point, was $105,580 per year, and the median-earning 50 percent of airline pilots made between $81,910 and $140,650 per year.