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.
Bronchi: The bronchi are the two air tubes that branch off of from the trachea and carry atmospheric air directly into the lungs. Lungs: The main organ of the respiratory system is lungs. Lungs are the site in body where oxygen is taken into and carbon dioxide is expelled out.ntroduction to parts of the respiratory system and their function. Respiratory system consists of the organs that help to breathe. Respiration also known as breathing is the process which delivers oxygen from the external atmosphere to the body and removes the carbon dioxide from body and expels out.