1. Control of Breathing

5. What controls our breathing rate?
Carbon dioxide & the Medulla oblongata
- the part of the brain that controls our breathing (& heart rate)
high levels of CO2 in blood is detected by the M. O. in the brain
---> increase our breathing rate & depth of breathing

6. 2. Oxygen and chemo receptors in large blood vessels
special cells in the aorta and other large blood vessels detect low oxygen
increase our breathing rate & depth of breathing

7. 3. Stretch receptors in the alveoli
• pressure cells in the alveoli detect pressure & will not allow you to inhale too far