Tag Archives: diffusion

Getting enough oxygen with severe respiratory disorders

Today I watched a beautiful short (7 min) film “Oxygen – The Old Man and His Bed” directed by Marc Issacs.  Bob, who suffers from a severe (un-named) respiratory condition, last went outside in 1982 to get permission to be … Continue reading

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So what’s all this oxygen about? Why we breathe part II

We explored how carbon dioxide is produced when sugars are broken down during cellular respiration on Monday and now understand why we must breathe out, but why exactly do we need the oxygen that we get when we breathe in?

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Whaaaat……eggs breathe? Part II: How bird, reptile and monotreme eggs exchange gases

Now we know how aquatic eggs (amphibians and fish) breathe, let’s explore how eggs that are normally laid on land exchange their respiratory gases.  The amniotes (reptiles, birds and mammals) mostly lay their eggs on the land, in burrows or … Continue reading

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Whaaaat……eggs breathe? How amphibian and fish eggs exchange gases

Yes, embryos inside eggs need to breathe!  This is going to be a big two-parter and we will explore how egg-laying amniotes (reptiles, birds and monotremes) eggs breathe in part two.  First, let’s discover how amphibian (frogs and salamanders) and … Continue reading

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No lungs, no gills: how do insects breathe?

They may make your skin crawl and you might wish to think of them as a lower life form, but insects have a remarkably elegant and simple way of delivering oxygen to their body and removing the carbon dioxide waste. … Continue reading

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