Anatomy & Morphology

Muscular System

근육계

Definition

The organ system responsible for body movement, posture maintenance, and heat generation through muscle contraction.

Detailed Explanation

Vertebrate muscles are classified by structure and control: skeletal muscle is striated and voluntary; smooth muscle lines organs and is involuntary; cardiac muscle is striated and autonomous. Muscles work in antagonistic pairs — when biceps contract, triceps relax. Shivering is involuntary skeletal muscle contraction that generates heat, directly linking the muscular and thermoregulatory systems.

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