呼吸/respiratory cycle in English/quiet breath:summary illustration
The graph shows temporal changes in each index within one respiratory cycle. The inflow during inspiration is shown as a negative value, and the outflow during expiration is shown as a positive value.
| beginning of inspiration | inspiration | end of inspiration | beginning of expiration | expiration | end of expiratioin | |
| diaphragm | contract | contract | contract | relax | relax | relax |
| lung volume | min | min→max | max | max | max→min | min |
| alveolar pressure | atmospheric pressure | negative pressure | atmospheric pressure | atmospheric pressure | positive pressure | atmospheric pressure |
| flow | none | in | none | none | out | none |
| inward elastic force of the lungs | min | min→max | max | max | max→min | min |
| negative pleural pressure | min | min→max | max | max | max→min | min |
(within one quiet respiratory cycle)
Challenge Quiz
The diaphragm is contracting during inspiration expiration .
The diaphragm is relaxing during inspiration B expiration .
The lung volume is at its minimum (within a quiet breath) at the end of inspiration (beginning of expiration) and at the end of expiration (beginning of inspiration) during inspiration at the end of inspiration (beginning of expiration) during expiration at the end of expiration (beginning of inspiration) .
The lung volume is increasing from its minimum to its maximum (within a quiet breath) at the end of inspiration (beginning of expiration) and at the end of expiration (beginning of inspiration) during inspiration at the end of inspiration (beginning of expiration) during expiration at the end of expiration (beginning of inspiration) .
The lung volume is at its maximum (within a quiet breath) at the end of inspiration (beginning of expiration) and at the end of expiration (beginning of inspiration) during inspiration at the end of inspiration (beginning of expiration) during expiration at the end of expiration (beginning of inspiration) .
The lung volume is decreasing from its maximum to its minimum (within a quiet breath) at the end of inspiration (beginning of expiration) and at the end of expiration (beginning of inspiration) during inspiration at the end of inspiration (beginning of expiration) during expiration at the end of expiration (beginning of inspiration) .
The inward elastic force of the lungs is at its minimum at the end of inspiration (beginning of expiration) and at the end of expiration (beginning of inspiration) during inspiration at the end of inspiration (beginning of expiration) during expiration at the end of expiration (beginning of inspiration) .
The inward elastic force of the lungs is increasing from its minimum to its maximum at the end of inspiration (beginning of expiration) and at the end of expiration (beginning of inspiration) during inspiration at the end of inspiration (beginning of expiration) during expiration at the end of expiration (beginning of inspiration) .
The inward elastic force of the lungs is at its maximum at the end of inspiration (beginning of expiration) and at the end of expiration (beginning of inspiration) during inspiration at the end of inspiration (beginning of expiration) during expiration at the end of expiration (beginning of inspiration) .
The inward elastic force of the lungs is decreasing from its maximum to its minimum at the end of inspiration (beginning of expiration) and at the end of expiration (beginning of inspiration) during inspiration at the end of inspiration (beginning of expiration) during expiration at the end of expiration (beginning of inspiration) .
Gas (air) flows in at the end of inspiration (beginning of expiration) and at the end of expiration (beginning of inspiration) during inspiration at the end of inspiration (beginning of expiration) during expiration at the end of expiration (beginning of inspiration) .
There is no gas flow at the end of inspiration (beginning of expiration) and at the end of expiration (beginning of inspiration) during inspiration C at the end of inspiration (beginning of expiration) during expiration at the end of expiration (beginning of inspiration) .
Gas flows out at the end of inspiration (beginning of expiration) and at the end of expiration (beginning of inspiration) during inspiration at the end of inspiration (beginning of expiration) during expiration at the end of expiration (beginning of inspiration) .
The pressure inside the lungs (alveolar pressure) is negative compared to the atmospheric pressure at the end of inspiration (beginning of expiration) and at the end of expiration (beginning of inspiration) during inspiration at the end of inspiration (beginning of expiration) during expiration at the end of expiration (beginning of inspiration) .
The pressure inside the lungs (alveolar pressure) is equal to the atmospheric pressure at the end of inspiration (beginning of expiration) and at the end of expiration (beginning of inspiration) during inspiration at the end of inspiration (beginning of expiration) during expiration at the end of expiration (beginning of inspiration) .
The pressure inside the lungs (alveolar pressure) is positive compared to the atmospheric pressure at the end of inspiration (beginning of expiration) and at the end of expiration (beginning of inspiration) during inspiration at the end of inspiration (beginning of expiration) during expiration at the end of expiration (beginning of inspiration) .
The negative pleural pressure is at its minimum (within a quiet breath) at the end of inspiration (beginning of expiration) and at the end of expiration (beginning of inspiration) during inspiration at the end of inspiration (beginning of expiration) during expiration at the end of expiration (beginning of inspiration) .
The negative pleural pressure is increasing from its minimum to its maximum (within a quiet breath) at the end of inspiration (beginning of expiration) and at the end of expiration (beginning of inspiration) during inspiration at the end of inspiration (beginning of expiration) during expiration at the end of expiration (beginning of inspiration) .
The negative pleural pressure is at its maximum (within a quiet breath) at the end of inspiration (beginning of expiration) and at the end of expiration (beginning of inspiration) during inspiration at the end of inspiration (beginning of expiration) during expiration at the end of expiration (beginning of inspiration) .
The negative pleural pressure is decreasing from its maximum to its minimum (within a quiet breath) at the end of inspiration (beginning of expiration) and at the end of expiration (beginning of inspiration) during inspiration at the end of inspiration (beginning of expiration) during expiration at the end of expiration (beginning of inspiration) .