| Front | Describe the gross structure of the human gas exchange system and how we breathe in and out. [6 marks] |
|---|---|
| Back | 1. Named structures – trachea, bronchi, bronchioles, alveoli; 2. Above structures named in correct order OR Above structures labelled in correct positions on a diagram; 3. Breathing in – diaphragm contracts and external intercostal muscles contract; 4. (Causes) volume increase and pressure decrease in thoracic cavity (to below atmospheric, resulting in air moving in); 5. Breathing out - Diaphragm relaxes and internal intercostal muscles contract; 6. (Causes) volume decrease and pressure increase in thoracic cavity (to above atmospheric, resulting in air moving out); |
Learn with these flashcards. Click next, previous, or up to navigate to more flashcards for this subject.
Next card: Fatty triglycerides acids phospholipids compare contrast structure properties
Previous card: Dna describe role named enzymes process semi-conservative replication
Up to card list: AQA Biology Flashcards