16 為甚麼心臟不會生癌？5.39.217.76' C9 w" z% L- j/ d R* L
胃、肝、大腸、睪丸都會生癌，但為甚麼沒聽過有心臟癌呢？原因在於心臟以外的細胞都具有增殖機能，即使受了傷，只要過一段時間就能痊癒，這是因為細胞增殖使傷口癒合，然而心臟的細胞並不會增殖。癌細胞會持續增殖，接著破壞周圍的組織，就是因為心臟細胞不會增殖的關係，所以癌細胞是無法侵襲心臟。5.39.217.769 D0 \. O! i$ ]& D' e% b! a# A
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in fact, the heart is made of muscle, so it can develop cancer too, normally is the cardiac muscle itself, if it's benign, it's called myxoma; if it's malignant, it's called angisarcoma  |
發表於 2007-5-27 12:20 PM
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tvb now,tvbnow,bttvb) u! b: s7 Z0 [( L
發表於 2007-6-6 12:51 PM
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