October 2018 1 12 Report
Saat kita melakukan banyak kegiatan fisik, maka nafas kita akan terengah engah atau irama nafas semakin cepat. namun saat kita istirahat, irama pernafasan kita sangat lambat. apa yang mengatur irama pernafasan kita? jelaskan mekanismenya!

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