The Respiratory System

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Presentation transcript:

The Respiratory System

The Respiratory System is all about... Gas Exchange Air Pressure

Pre-Knowledge Check-In Find a Partner and See if you can fill in this chart And now the answers GAS N2 O2 Ar CO2 INHALED 78% 21% ~1% 0.03% EXHALED 16% 5% GAS N2 O2 Ar CO2 INHALED EXHALED

Resting (Between Breaths) What is the air pressure inside the lungs? What muscles are working at this stage? How do the ribs protect the lungs? How are the Brain and the Circulatory System involved?

Inhalation What is the air pressure inside the lungs? What muscle(s) are working to help inhale? How do the ribs help expand the lungs? What is the Circulatory System doing at this point?

Exhalation What is the air pressure inside the lungs? What muscle(s) are contracted during exhalation? How do the ribs help exhalation occur? What is the circulatory system pushing out of the body during exhalation? In all these steps when do lungs contract/expand?