Respiratory system 1 5.11.2007. Objectives for today …… What respiration is?What respiration is? Why oxygen is important?Why oxygen is important? What.

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Respiratory system

Objectives for today …… What respiration is?What respiration is? Why oxygen is important?Why oxygen is important? What makes up the respiration system?What makes up the respiration system? What muscles help in breathing?What muscles help in breathing? What is Gaseous exchange?What is Gaseous exchange?

What is Respiration? Respiration is the circulation on gases around the body. The supply of gases is delivered through the process of breathing.(Respiration)

The Respiratory System

Inspiration

Expiration

Breathing Action

In Summary

BRONCHIOLES AND ALVEOLI

Gaseous Exchange

In the lungs, carbon dioxide (CO2) from the blood passes into the alveoli through the respiratory membrane, a thin barrier that has several layers.In the lungs, carbon dioxide (CO2) from the blood passes into the alveoli through the respiratory membrane, a thin barrier that has several layers. Oxygen (O2) crosses the membrane in the opposite direction, from the alveoli to the blood capillaries.Oxygen (O2) crosses the membrane in the opposite direction, from the alveoli to the blood capillaries. The fitter we become the more efficient this transfer becomes.The fitter we become the more efficient this transfer becomes.

Objectives for today …… What respiration is?What respiration is? Why oxygen is important?Why oxygen is important? What makes up the respiration system?What makes up the respiration system? What muscles help in breathing?What muscles help in breathing? What is Gaseous exchange?What is Gaseous exchange?

NEXT LESSON …… Gaseous exchange continued …Gaseous exchange continued … LUNG CAPACITY Tidal volume and Residual volumeTidal volume and Residual volume Vital capacityVital capacity Total lung capacityTotal lung capacity Respiration and physical exerciseRespiration and physical exercise

HOMEWORK Homework Sheets 1 & 2.Homework Sheets 1 & 2. Due:Due:

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