Respiratory System Video Lessons

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Problem: Why are gills typically external and lungs typically internal?

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Gills: O2 diffuses from water to capillaries

Lungs: O2 diffuses from air to capillaries

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Problem Details

Why are gills typically external and lungs typically internal?

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Respiratory System concept. You can view video lessons to learn Respiratory System. Or if you need more Respiratory System practice, you can also practice Respiratory System practice problems.