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Unformatted text preview: which are the most numerous and produce the protein fibers and ground substance of connective tissues. White blood cells function in immune protection while mast cells are found in the skin and secrete heparin and histamine . Adipocytes store triglycerides . Several other specific cell types will be discussed later. The two major proteins found in connective tissue are collagen and elastin . Collagen fibers are tough yet flexible and are resistant to stretch. These proteins are prominent in tendons and ligaments. Thin glycoprotein-coated collagen fibers form the framework of some lymphatic organs and are called reticular fibers. The protein elastin forms thin branching fibers that stretch and recoil like a rubber band. These fibers give skin, lungs and arteries the ability to stretch and bounce back....
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- Fall '10