3.8.2: Diaphragm activity and lung volume -2

When inspiratory muscles, such as the diaphragm relax, the thoracic cavity and lungs decrease in volume.

Blue indicates that the diaphragm is relaxed. With diaphragm relaxation, the lung volume decreases. This process is expiration.

The decrease in volume is due to the elasticity of the lungs, which will be discussed later.
 
diaphragmrelaxrelaxrelax
lung volume (within one quiet respiratory cycle)maxmax→minmin

チャレンジクイズ

1 When expiratory muscles inspiratory muscles  such as the diaphragm relax, the lungs and the thoracic cavity increase decrease  in volume.

このページのトップにスクロール

: Lung volume, pressure inside the lungs and air flow-1

: Diaphragm activity and lung volume -1