PHYS P20 Lecture Notes - Lecture 9: Intercostal Muscle, Exhalation, Epiglottis
3 Dec 2018
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Group 4: mechanics of breathing and the pathway of air upon inhalation and exhalation. Here is a general overview of the anatomy of the respiratory system, we will go into a bit more detail in future slides. There is the epiglottis that divides the larynx and pharynx, this covers the larynx when we eat. We breath in oxygen gas into our nasal or oral cavity and it goes down towards our larynx down to the trachea, and into the lungs and we breath out co2. Gasses move from an area of high pressure to an area of low pressure. There are several muscles and pressures involved in the respiratory system, but there are only a few that are really important to the mechanism of breathing. Connecting the ribs are muscles known as intercostal muscles, there are three intercostal muscles external, internal, and innermost, which stabilize your upper body and aid in breathing.
