The figure below illustrates the inhalation step of gas exchange in humans.
![The figure below illustrates the inhalation step of gas exchange in humans. In this figure, the diaphragm and the muscle of the ribcage are _________ [relaxed or contracted?].](https://d2lvgg3v3hfg70.cloudfront.net/TB1876/11ea33e0_8f84_d7e0_963a_0fd5111fcd49_TB1876_00.jpg)
In this figure, the diaphragm and the muscle of the ribcage are _________ [relaxed or contracted?].
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