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What is the function of the iris being striated in birds and not in mammals?

April 26, 2017Birds function IRIS mammals striated

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What is the function of the iris being striated in birds and not in mammals?

1 Answer

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striated muscle is under voluntary control – so they can consciously focus their eyes smooth muscle is involuntary (no conscious control), thus the eye focuses as a reflex (it is a little slower), not a problem for slow terrestrial animals but a big problem for fast flying ones.