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SUMMARY:7.2 Kinds of Muscles
DTSTART;TZID=America/Los_Angeles:20260407T190000
DTEND;TZID=America/Los_Angeles:20260407T200000
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DESCRIPTION: Can be classified in two ways:

Voluntary muscles are under the control of the will and are capable of rapid and complicated movements; for example, walking, talking, or swallowing.
Sphincters are special voluntary muscles that guard body openings.
Involuntary muscles are not under the control of the will and are capable of slow and mechanical movement only. They are found in the walls of blood vessels and in most of the internal organs. Cardiac muscle is found only in the heart and is a special form of involuntary muscle. The working of the involuntary muscles is controlled by a special set of nerves known as the autonomic nervous system.

And

Skeletal muscle: Skeletal muscles are the only muscles that can be consciously controlled. They are attached to bones, and contracting the muscles causes movement of those bones. Any action that a person consciously undertakes involves the use of skeletal muscles. Examples of such activities include running, chewing, and writing.
Smooth...

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