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Does the bowfin gas bladder have any internal features similar to lungs on mammals, e.g., alveoli, bronchi, capillaries for blood-gas exchange?

April 26, 2017alveoli bladder bowfin features Gas Internal lungs mammals similar

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Does the bowfin gas bladder have any internal features similar to lungs on mammals, e.g., alveoli, bronchi, capillaries for blood-gas exchange?

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The gas bladder is vascularized, but is a very simple structure. It doesn’t have any real elaborations like alveoli. The capillaries drain into a venous sinus that empties into the venous supply just outside the heart.