How we breathe using the bell jar model

Topics: Respiratory system, Blood, Heart Pages: 3 (488 words) Published: April 17, 2015

How we breathe using the bell jar model
How the body parts of the respiratory system are represented in the bar jar model The Y tube is the trachea that is then divided into air passages named bronchioles in the lungs. The balloon is the lungs that expands when we inhale and when we inhale they get bigger so when any substance enters the balloon it expands just like the lungs The Diaphragm is represented in the model as a rubber sheet because the diaphragm goes down when we inhale making space for the lungs to expand.

How we breather using a bell jar model
How we breathe
It first initiate when we inhale either through our nose or mouth and the air goes through the trachea then divides into air passages that go through the lungs called bronchi . The lungs expand changing the lung volume and pressure. The bronchi divide into smaller air passages called bronchioles which have air sacs at the end of it named alveoli. It encompasses thin walled blood vessels called capillaries The C02 (carbon dioxide) from the bloodstream in the capillaries is diffused into the air in the alveoli as a waste product. At the same time, the inhaled oxygen in the alveoli is diffused into the bloodstream. This is process is known as Gas exchange. Then the oxygen rich blood is sent to the heart and after that the heart pumps the blood around the body to our cells though the arteries. Then the arteries absorb the C02.then the C02 is brought back to the lungs and when we exhale C02 is exerted out of the body. Strengths and weaknesses about the model

The model has a good structure of the parts of the system but if you put a substance in the balloon to show that that lungs expands when we breathe it could get too heavy and fall off. The model isn’t very detailed as it doesn’t show the bronchioles or the air sacs in the lungs but it is basic and to the point

Clara or Dominic
Clara states that the model is correct as it shows that we breathe because the diaphragm...
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