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5/7 ppt for tom test
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The Respiratory System
Respiration
• Exchange of oxygen and carbon dioxide– Animals : breathe in oxygen, expels carbon dioxide– Plants: breathe in carbon dioxide, expels oxygen
What do animals need oxygen for?
Oxygen
• Burn ATP (adenosine triphosphate, energy giving molecule)
• Process expels carbon dioxide
In simple organisms…
• Respiration occurs between the organism and its immediate surrounding
In more complex organisms
In primates, specifically humans…
• External– Between the atmosphere and blood
• Internal– Between the blood and the body tissues
Inspiration and Expiration
Act of breathing in
Act of breathing out
Process
• How does air flow through your body?
Parts of the respiratory system
Lungs
Gas exchange in alveoli: Diffusion
Just because you don’t see it, it does not mean there is nothing
wrong.
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