Strings (tennis) be more durable than many other types of strings due to its outstanding tension retention. This may help to offset the high initial cost. The use of a dense string pattern also generally improves the longevity of natural gut. Natural gut is produced by drying fibers extracted from a part of the cow intestine called the serous membrane, or serosa, which contains collagen designed to withstand the stretching and contraction of the intestine. It is this elasticity that makes the fibers useful for tennis string. Sheep intestines have also been used for racquet strings in the past. The first natural
String instrument to the east of Mesopotamia, in Bactria, Gandhara, and Northwest India, and shown in sculpture from the 2nd century BC through the 4th or 5th centuries AD. During the medieval era, instrument development varied from country to country. Middle Eastern rebecs represented breakthroughs in terms of shape and strings, with a half a pear shape using three strings. Early versions of the violin and fiddle, by comparison, emerged in Europe through instruments such as the gittern, a four stringed precursor to the guitar, and basic lutes. These instruments typically used catgut (animal intestine) and other materials, including silk, for their