Founded in 1857, the Science Museum is another renowned museum located in London. Holding a collection of over 300,000 items, the Science Museum is the fifth most visited museum in the United Kingdom with more than 3.4 million visitors annually. 18 MusÃ©e dÂ´Orsay, Paris, France (3.5 million visitors annually)
From the nose, the air passes through the pharynx (the cavity behind the nose and mouth) and the larynx (the voice box). The air then enters the trachea. The trachea carries the air toward the lungs. Before reaching the lungs, the trachea splits into two tubes called the primary bronchi. Each tube enters one lung. Within the lungs, the primary bronchi divide into smaller and smaller tubes, finally branching into extremely tiny tubes called bronchioles.
Lungs, Lungs Diseases, Functions of Lungs. Lungs are the major organ of our respiratory system, helping us obtain oxygen and get rid of carbon dioxide. Our chest cavity houses a pair of lungs which open to the external environment through the nose and mouth. A cylindrical tube, called trachea, is the main link between the lungs and the nose and mouth.