Apologia General Science, Module 14, The Human Respiratory and Circulatory Systems

►Videos and Resources for M14 Breathe! Just breathe. Isn't that wonderful? Without conscious thought (except now you're probably thinking about it), we breathe and exchange carbon dioxide for fresh oxygen every moment of every day for our entire life. How many breaths do you think you could have in a lifetime? WikiAnswers says it could be 672,768,000!!! Time how many breaths you take in one minute and figure it out! We did this experiment to see how many cups of air our lungs can hold…

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Apologia General Science

Apologia Anatomy

Human Body Lesson

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