Respiratory system 1Respiratory system 1

5.11.20075.11.2007

Objectives for today……Objectives for today……

• What respiration is?What respiration is?• Why oxygen is important?Why oxygen is important?• What makes up the respiration What makes up the respiration

system?system?• What muscles help in breathing?What muscles help in breathing?• What is Gaseous exchange? What is Gaseous exchange?

What is Respiration?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 SystemThe Respiratory System

InspirationInspiration

ExpirationExpiration

Breathing ActionBreathing Action

In SummaryIn Summary

BRONCHIOLES AND BRONCHIOLES AND ALVEOLIALVEOLI

Gaseous ExchangeGaseous Exchange

Gaseous ExchangeGaseous Exchange

• In the lungs, carbon dioxide (CO2) from In the lungs, carbon dioxide (CO2) from the blood passes into the alveoli through the blood passes into the alveoli through the respiratory membrane, a thin barrier the respiratory membrane, a thin barrier that has several layers. that has several layers.

• Oxygen (O2) crosses the membrane in Oxygen (O2) crosses the membrane in the opposite direction, from the alveoli the opposite direction, from the alveoli to the blood capillaries.to the blood capillaries.

• The fitter we become the more efficient The fitter we become the more efficient this transfer becomes.this transfer becomes.

Objectives for today……Objectives for today……

• What respiration is?What respiration is?• Why oxygen is important?Why oxygen is important?• What makes up the respiration What makes up the respiration

system?system?• What muscles help in breathing?What muscles help in breathing?• What is Gaseous exchange? What is Gaseous exchange?

NEXT LESSON……NEXT LESSON……

• Gaseous exchange continued…Gaseous exchange continued…LUNG CAPACITYLUNG 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

HOMEWORKHOMEWORK

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