<span>Collagen fibers. You can identify these as collagen fibers in part because they are fairly straight rather than springy. Collagen is a fibrous protein that is found in human connective tissue - specifically collagen can be found in human skin, bones, cartilage, and ligaments.</span>
Rivers often start from the mountain streams and contain high amounts of oxygen. Rivers and streams grow larger as these waters merge. Rivers pick up sediments from the land as they flow. Lakes support many varieties of organisms, including plants in shallow,