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Answer to Jake Where does the carbon come from when it combines with O2 to create CO2

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Answer to Jake Where does the carbon come from when it combines with O2 to create CO2

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The carbon comes from glucose. Glucose reacts with water to produce carbon dioxide

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epithelium is the thin tissue lining of the alimentary canal

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Answer to Anton: What is the surface area of our lungs?

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Answer to Anton: What is the surface area of our lungs?

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I looked it up and it said it was roughly 50-75 m^2 which is about the same area as one side of a tennis court. Pretty cool stuff.

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Answer to Mookie. Can fish breathe through mouth? 

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Answer to Mookie. Can fish breathe through mouth? 

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Water does go through their mouths and goes out through their gills while they absorb the the oxygen

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Answer to Mookie "Can fish breathe through their mouths?"

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Answer to Mookie "Can fish breathe through their mouths?"

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Fish take water in through their mouths and the oxygen goes out through their gills, so I think they can't.

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Answer to Owen "Why did life evolve to live on land?"

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Answer to Owen "Why did life evolve to live on land?"

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When fish mutated the ability to breath and walk on land, the food available, combined with a lack of natural land predators, allowed them to live longer and reinforce their mutations, evolving.

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Answer to Alex "Are humans evolving into more than one species?"

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Answer to Alex "Are humans evolving into more than one species?"

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No, because our less primal lifestyle doesn't present us with many primal challenges, which would help evolution take its course.

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Answer to Owen "Why did life evolve to live on land?

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Answer to Owen "Why did life evolve to live on land?

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Plants evolved first and once oxygen was available many fish species started to make their way onto land.

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the thin tissue lining of alimentary canal.

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Answer to Dorian "When birds glide are they looking cool/having fun or are they helping themselves breathe?"

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Answer to Dorian "When birds glide are they looking cool/having fun or are they helping themselves breathe?"

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The way many bird's wings (and the wings of airplanes) work is the shape makes the air pressure under the wing greater than above the wing, keeping the bird in the air without them having to flap constantly like hummingbirds. So if a bird glides they are probably just staying in the air while conserving energy. I am very, very sure that they have lungs unlike the tracheal system in insects, so movement might not relate as much to their breathing.

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Answer to Alex "Can a human get sick from having too much oxygen in their blood?"

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Answer to Alex "Can a human get sick from having too much oxygen in their blood?"

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I think so. I believe I heard that before ventilators pumped regular air into the lungs of patients that couldn't breathe on their own, the ventilators pumped pure O2. If this is true, this either means that this was too harmful or too expensive.

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Would it be possible for humans to evolve to breath something besides 02

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Is there any evidence that shows that humans' respiratory systems are evolving? 

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Is there any evidence that shows that humans' respiratory systems are evolving? 

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Are humans evolving into more than one species?

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Are humans evolving into more than one species?

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How many respiratory openings do insects have? 

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How many respiratory openings do insects have? 

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When birds glide are they looking cool/having fun or are they helping themselves breathe?

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When birds glide are they looking cool/having fun or are they helping themselves breathe?

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As evolution continues, what will eventually change over time in the human or fish respiratory system. 

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As evolution continues, what will eventually change over time in the human or fish respiratory system. 

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what prevents fish from ingesting water through their mouths when eating?

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what prevents fish from ingesting water through their mouths when eating?

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like a sphincter of some sort
?

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What does ATP have to do with the exchange of gas in cells and how does mitochondria create it? 

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What does ATP have to do with the exchange of gas in cells and how does mitochondria create it? 

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What animals use diffusion for breathing?

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What animals use diffusion for breathing?

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How will our lungs evolve in the future?

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How will our lungs evolve in the future?

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How do you train ones body to hold their breath underwater for a longer period of time? 

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How do you train ones body to hold their breath underwater for a longer period of time? 

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are there any lung/gill hybrids living today?

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how many "branches" would we need if we had a tracheal system

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how many "branches" would we need if we had a tracheal system

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 Where does the carbon come from to combine with the O2 to form CO2?

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 Where does the carbon come from to combine with the O2 to form CO2?

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Why do certain species evolve into more than one type of a new species?

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Why do certain species evolve into more than one type of a new species?

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What was the original breathing method before evolution?

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What was the original breathing method before evolution?

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why would water evaporation be a problem for the respiratory system?

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why would water evaporation be a problem for the respiratory system?

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Can a human get sick from having too much oxygen in their blood?

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Can a human get sick from having too much oxygen in their blood?

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what if humans had respiratory systems similar to worms

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what if humans had respiratory systems similar to worms

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What are the pros/cons for each method of intaking oxygen?

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What are the pros/cons for each method of intaking oxygen?

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Are the trachea of bugs moist?

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Does this gas exchange occur for every animal?

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Does this gas exchange occur for every animal?

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What kind of cells are blood vessels made of?

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What kind of cells are blood vessels made of?

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Are bugs so abundant because of their respiratory system?

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Are bugs so abundant because of their respiratory system?

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How much of a bug is made up by trachea

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What other methods of absorption do animals have?

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What other methods of absorption do animals have?

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What other gases can be absorbed by red blood cell?

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What other gases can be absorbed by red blood cell?