General Features

Muscle is classified as skeletal, cardiac, or smooth. Some general features of all three types of muscle are summarized in Table 1-3-1.

Table 1-3-1. General Cytologic Features of the Three Types of Muscle

j Skeletal

Cardiac

Smooth

Striated, unbranched fibers

Striated, branched fibers

Non stria ted, fusiform fibers

Multinu clear i

Single nucleus

Single nucleus

Strong, quick, discontinuous, voluntary contraction

Strong, quick, continuous, involuntary contraction

Weak, slow, involuntary contraction

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