| Front | Describe how air is taken into the lungs. ( 3 marks) |
|---|---|
| Back | contraction of (diaphragm) muscles flattens diaphragm; contraction of intercostal muscles raises ribcage; increase in volume decreases pressure; |
Learn with these flashcards. Click next, previous, or up to navigate to more flashcards for this subject.
Next card: Describe path oxygen alveolus blood marks alveolar epithelium;
Previous card: Carrier produce active proteins sodium ions epithelial cells
Up to card list: AQA Biology Flashcards