Inspiration involves the contraction of external intercostal muscles and the diaphragm, lifting the ribs and flattening the diaphragm, increasing thoracic volume and decreasing pressure to allow air to enter.
A inspiração envolve a contração dos músculos intercostais externos e do diafragma, elevando as costelas e achatando o diafragma, aumentando o volume torácico e diminuindo a pressão para permitir a entrada de ar.
| Front | What are the stages for inspiration |
|---|---|
| Back | Uses energy External intercostal muscles contract Internal intercostal muscles relax Ribs pulled upwards and out increasing thorax volume Diaphragm muscle contracts causing it to flatten increasing volume of the thorax Increased volume=decreased pressure Atmospheric pressure>pulmonary pressure so air is forced in. |
Learn with these flashcards. Click next, previous, or up to navigate to more flashcards for this subject.
Next card: Pressure intercostal muscles thorax decreased stages expiration external
Previous card: Gradient describe oxygen air reaches capillaries surrounding alveoli
Up to card list: AQA Biology Flashcards