January 30, 2009

動物的形態與功能-42.循環與氣體交換

動物體內的循環作用
circulation animals
1.運輸系統在功能上連接了身體細胞與器官間之物質交換
Transport systems funationally connect the organs of exchange with the body cells

近距離:擴散作用ex:葡萄糖擴散速率1/3(cm/hr)
遠距離:循環系統ex:氧氣~單層上皮細胞~組織間液.微血管
*循環系統.運輸系統共同影響生物"恆定性"

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