The Respiratory System and Ventilation
- Created by: 13mlilli
- Created on: 21-02-18 20:25
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- Respiratory system + Ventilation
- Lungs are in the thorax
- Separated from from lower body by diaphragm
- Lungs surrounded by pleural membranes
- Breathing in...
- 1) Intercostal muscles + diaphragm contract
- 2) Thorax volume increases
- 3) Pressure decreases and air enters
- Breathing out...
- 1) Intercostal muscles + diaphragm relax
- 2) Thorax volume decreases
- 3) Pressure increases and air goes out
- Exercise increases breathing rate
- Experiment
- 1) Sit still for 5 mins + count no. of breaths in 1 min
- 2) 4 mins of exercise + count no. of breaths for 1 min
- 3) Repeat for 2 other ppl. + compare
- Muscles respire more so need more O2 + more CO2 removed
- Experiment
- Lungs are in the thorax
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