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.
The respiratory system provides oxygen to the bodyâs cells while removing carbon dioxide, a waste product that can be lethal if allowed to accumulate. There are 3 major parts of the respiratory system: the airway, the lungs, and the muscles of respiration.The airway, which includes the nose, mouth, pharynx, larynx, trachea, bronchi, and bronchioles, carries air between the lungs and the bodyâs exterior.The lungs...ulmonary Ventilation. Pulmonary ventilation is the process of moving air into and out of the lungs to facilitate gas exchange. The respiratory system uses both a negative pressure system and the contraction of muscles to achieve pulmonary ventilation.