16 為甚麼心臟不會生癌？
1 T# x5 ^) |1 _0 [6 Y6 bos.tvboxnow.com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。* n; x' N+ s. @) o* U
os.tvboxnow.com( S: \4 `9 R7 y6 f4 m
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
| 
發表於 2007-6-6 12:51 PM
| 
