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Where do sea animals and land animals get oxygen to breathe?

Where do sea animals and land animals get oxygen to breathe?

Sea animals either get their oxygen from the one dissolved in the water (fish, mollusks, crustaceans, etc.) or come to the surface to breathe (whales, dolphins, penguins, seals)

Land animals essentially get their oxygen directly from the air that they breathe (vertebrates in general), that diffuses through trachea (insects and other arthropods) or through their skin (worms, snails).

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One Response to “Where do sea animals and land animals get oxygen to breathe?”

1. 

   Vincent G October 19th, 2009, 4:13 pm

   Sea animals either get their oxygen from the one dissolved in the water (fish, mollusks, crustaceans, etc.) or come to the surface to breathe (whales, dolphins, penguins, seals)

   Land animals essentially get their oxygen directly from the air that they breathe (vertebrates in general), that diffuses through trachea (insects and other arthropods) or through their skin (worms, snails).
   References :