Expiration involves the relaxation of external intercostal and diaphragm muscles, elastic recoil, and subsequent downward and inward movement of the rib cage and upward movement of the diaphragm, decreasing thoracic volume and increasing pressure, causing air to move out of the lungs.
L'espirazione comporta il rilassamento dei muscoli intercostali esterni e del diaframma, il richiamo del tessuto elastico e la successiva discesa e rientro della gabbia toracica e il sollevamento verso l'alto del diaframma, che diminuisce il volume toracico e aumenta la pressione, causando l'uscita di aria dai polmoni.
| Front | Describe expiration. |
|---|---|
| Back | - external intercostal muscles relax - elastic tissue recoils - ribcage moves downwards and inwards - diaphragm muscle relaxes - diaphragm pushed upwards by abdominal contents - thorax volume decreases - thorax pressure increases - air moves out of lungs into atmosphere down pressure gradient |
Tags: gas_exchange
Learn with these flashcards. Click next, previous, or up to navigate to more flashcards for this subject.
Next card: Inspiration expiration active which of
Previous card: Intercostal muscles diaphragm thorax pressure describe inspiration external
Up to card list: AQA A Level Biology