Mode of transport available, especially in underdeveloped or inaccessible regions. Although humans are able to walk without infrastructure, the transport can be enhanced through the use of roads, especially when using the human power with vehicles, such as bicycles and inline skates. Human-powered vehicles have also been developed for difficult environments, such as snow and water, by watercraft rowing and skiing; even the air can be entered with human-powered aircraft. Land transport covers all land-based transportation systems that provide for the movement of people, goods and services. Land transport plays a vital role in linking communities to each other. Land transport is a
Father of surgery the veins. He has been called the "father of ancient surgery". The Scotsman John Hunter (1728–1793) was known for his scientific, experimental approach to medicine and surgery. He has been called the "father of modern surgery". The American surgeon Philip Syng Physick (1768–1837) worked in Philadelphia and invented a number of new surgical methods and instruments. He has been called the "father of modern surgery". The Englishman Joseph Lister (1827–1912) became well known for his advocacy of the use of carbolic acid (phenol) as an antiseptic, and was dubbed the "father of modern surgery" as a result. The German Theodor