Respiratory Per 7

Respiratory System Pulmonologists: Dr. Davis Dr. Jackie Dr. Eduardo Dr. Kristen

Functions of the Respiratory System The main function is to absorb and release carbon dioxide. 

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Respiratory System

Nose, Sinus, Mouth Trachea Bronchi Bronchiole lungs Alveoli

GAS EXC HAN The gases exchanged are Carbon Dioxide & Oxygen. Gas GE! exchange occurs in the alveoli. 

3 principles of gas exchange -Oxygen and Carbon Dioxide are carried by the blood. -Gases move by diffusion that is, they move from an area of higher concentration to an area of lower concentration. -The lining of the alveoli must be moist to help gases diffuse -

Students know how the complementary activity of major body systems provide cells with oxygen and nutrients and removes toxic waste products such as carbon dioxide.

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Oxygen Diffusion 

Alveolus

Oxygen concentrations are higher than in the capillary

Capillary and alveolus walls Oxygen diffuses from alveolus into the capillary

Capillary

Oxygen binds to hemoglobin in the blood and is convoyed to cells

Carbon Diffusion

Alveolus

Capillary and alveolus walls

Carbon Dioxide and water vapor separate and exhaled

Carbon dioxide and water vapor diffuses into the alveolus

Capillary Carbon dioxide and water vapor concentrations are higher then in the alveolus