Question

Are there striations across the width of muscle cells?

Answer 1

Cardiac muscle: Has striations, Has only one nucleus, Controlled involuntarily, Can function without nerve stimulation.

Smooth muscle: Doesn't have striations, Has only one nucleus, Controlled involuntarily, Can't be contracted consciously.

Skeletal muscle: Has striations, Has multiple nuclei, Controlled voluntarily, Functions in response to nerve stimulation.

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Answer 2

Here is your answer I hope it was useful: a striation is any of a number of tiny parallel grooves such as: the scratches left by a glacier on rocks or the streaks or ridges in muscle tissue. Your answer is yes, there are striation across the width of a muscle.
Have a nice day.