https://padlet.com/spcc_why1/breathingsystem2G en-us 2017-11-16 02:41:39 UTC 2025-12-15 07:17:26 UTC hello@padlet.com spcc_why1 https://padlet.com/spcc_why1/breathingsystem2G/wish/207505253 List the differences between 
1. the bell jar model, and
(a) The bell jar is rigid so it cannot move to demonstrate the movement of the ribs in our body.
(b) the rubber sheet is pushed up to demonstrate breathing out.  The diaphragm in our body relaxes in order to form a dome-shape itself. For breathing in, the rubber sheet is released to become flattened.  The diaphragm contracts to become flattened.
2. the rib-cage model
from the breathing system of human beings. 
(a) The model cannot show the air flow.
(b) The model cannot show the change in gas pressure
(c) The model shows 2D movement only.
(d) In breathing in, the intercostal muscles contract but the rubber band in the model is under lower tension. ]]> 2017-11-16 02:43:26 UTC https://padlet.com/spcc_why1/breathingsystem2G/wish/207505253 spcc_why1 https://padlet.com/spcc_why1/breathingsystem2G/wish/207505359 1(a)
1(b)
2(a) the chest goes upwards and inwards, following the pace of breathing; but the rib-cage model goes upwards and downwards.
2(b) Also, the chest and the rib cage have different lengths and widths. The rib cage is much flatter than our chest. (The rib cage is a 2D model and the chest has three dimensions)]]> 2017-11-16 02:44:02 UTC https://padlet.com/spcc_why1/breathingsystem2G/wish/207505359 spcc_why1 https://padlet.com/spcc_why1/breathingsystem2G/wish/207505445 1(a) The diaphragm contracts when we breathe in but pushing uxp the rubber sheet, which creates a higher tension,  represents breathing out. Similarly, releasing the rubber sheet represents breathing in but actually when the diaphragm relaxes, we are breathing out. The movement of the diaphragm and  rubber sheet in the model is different. 
1(b) When we are breathing, our chest will move inwards or outwards but the bell jar will not as it is rigid. 
2(a) The rib cage model does not include the lungs. 
2(b) Our ribs and backbone are not rectangular in shape and the intercostal muscles aren't a diagonal line in our body, nor are they parallel to each other. ]]> 2017-11-16 02:44:32 UTC https://padlet.com/spcc_why1/breathingsystem2G/wish/207505445 spcc_why1 https://padlet.com/spcc_why1/breathingsystem2G/wish/207505471 1(a) Construction of chest. In real life, lungs aren't made out of rubber, but out of tissue, air sacs and much more.
1(b) size. in reality, the size of our lungs is much more larger than the 'lungs' in the bell-jar model.
2(a) the whole appearance is different. our chest isn't even shaped like a square/rectangle
2(b) Material. the ribcage is made out of bones and tissue, not planks of plastic (?)]]> 2017-11-16 02:44:41 UTC https://padlet.com/spcc_why1/breathingsystem2G/wish/207505471 spcc_why1 https://padlet.com/spcc_why1/breathingsystem2G/wish/207505494 1(a)
1(b)
2(a) The chest can move outwards and inwards, but the rib-cage model can ony move upwards and downwards
2(b) The rib cage model is flat (2D), but the real thing is 3D]]> 2017-11-16 02:44:48 UTC https://padlet.com/spcc_why1/breathingsystem2G/wish/207505494 spcc_why1 https://padlet.com/spcc_why1/breathingsystem2G/wish/207505504 1(a) our lungs is made out of millions of air secs instead of 2 rubber balloons
1(b) The bell jar's shape is not like the real lungs in a human body and is rigid which means that it cannot demonstrate the movement of our ribs in our body.
2(a)
2(b)]]> 2017-11-16 02:44:52 UTC https://padlet.com/spcc_why1/breathingsystem2G/wish/207505504 spcc_why1 https://padlet.com/spcc_why1/breathingsystem2G/wish/207505512 1(a)
1(b)
2(a)
2(b)]]> 2017-11-16 02:44:56 UTC https://padlet.com/spcc_why1/breathingsystem2G/wish/207505512 spcc_why1 https://padlet.com/spcc_why1/breathingsystem2G/wish/207505528 1(a) human's lungs consist of many tiny air sacs but the model doesnt. human's lung is protected by ribs which can move inwards and outwards 3
1(b)
2(a)
2(b)]]> 2017-11-16 02:45:03 UTC https://padlet.com/spcc_why1/breathingsystem2G/wish/207505528 spcc_why1 https://padlet.com/spcc_why1/breathingsystem2G/wish/207505544 1(a) when we breathe in, the diaphragm flattens because of contraction but the rubber sheet flattens because of lower tension.
1(b) when we breathe out, the diaphragm forms a dome-shaped because of relaxation and the rubber sheet is pushed up because of higher tension.
2(a)
2(b)]]> 2017-11-16 02:45:08 UTC https://padlet.com/spcc_why1/breathingsystem2G/wish/207505544 https://padlet.com/spcc_why1/breathingsystem2G/wish/211224263 2017-11-29 01:13:07 UTC https://padlet.com/spcc_why1/breathingsystem2G/wish/211224263 sp20165441 https://padlet.com/spcc_why1/breathingsystem2G/wish/211226246 2017-11-29 01:27:00 UTC https://padlet.com/spcc_why1/breathingsystem2G/wish/211226246 https://padlet.com/spcc_why1/breathingsystem2G/wish/211226255 2017-11-29 01:27:03 UTC https://padlet.com/spcc_why1/breathingsystem2G/wish/211226255