Biology, 13.07.2019 19:00 rafaellazaro60pcw3w5

The iris in the human eye contracts and expands, controlling the amount of light that reaches the retina. what types of muscle control this? a. skeletal and voluntary b. smooth and cardiac c. skeletal and smooth d. smooth and involuntary

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The iris in the human eye contracts and expands, controlling the amount of light that reaches the re...