Thó-lūn:Sim-chōng
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心臟


心臟是脊脽動物一種筋肉組成的器官,內底面空空,負責共血透過血管 (blood vessel)送到規身軀,心臟定著真有規律咧收縮,心臟的心筋 (cardiac muscle)是一款不隨意筋 (involuntary muscle),專途用踮心臟,真勇。
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