| Front | What are the stages of expiration |
|---|---|
| Back | External intercostal muscles relax Internal intercostal muscles contract Ribs move down and inwards decreasing thorax pressure Diaphragm relaxed so the volume of thorax decreased Decreased volume= increased pressure Pulmonary pressure> atmospheric pressure |
Learn with these flashcards. Click next, previous, or up to navigate to more flashcards for this subject.
Next card: Blood capillaries red cells pulmonary diffusion alveolar alveoli
Previous card: Intercostal muscles increasing thorax volume pressure stages inspiration
Up to card list: AQA Biology Flashcards