Cylindrical cells {muscular tissue}| can contain contractile actinomycin myofibrils. Muscles can be involuntary or voluntary.
Cardiac and smooth muscles {involuntary muscle}| can contract strongly, slowly, and for long times.
Heart has involuntary muscle {cardiac muscle}.
Involuntary muscles {smooth muscle}| can be in digestive tract and uterus.
Muscles {voluntary muscle}| can contract fast with short contraction time. Only mammals have lateral corticospinal tract, for voluntary-muscle control.
Voluntary muscles {skeletal muscle}| can attach to bones.
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Date Modified: 2022.0225