Question

differentiate between muscle in hands and muscles in iris

Answer 1

Iris controls the size of the pupil which in turn controls the amount of light which enters our eye. On the other hand ciliary muscles contract and relax to adjust the focal length of the eye lens to enable us to see distant and near objects simultaneously.
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Answer 2

muscles in hands are ectodermal in origin and are are made up of skeletal muscle where as muscle in iris are mesodermal in origin and are made up of smooth muscle