Help!!!!!!!!!1微血管有無瓣膜+?

2007-03-25 9:20 pm
微血管有無瓣膜+?
更新1:

that means.......? 有定無牙?

回答 (3)

2007-03-25 9:41 pm
✔ 最佳答案
沒有 , 只有靜脈先有瓣膜防止血液倒流..

2007-03-25 15:33:30 補充:
樓下 , artery點會有valves , 得vein先有valves

2007-03-26 16:55:20 補充:
微血管就一定無
2007-03-27 4:40 am
微血管無瓣膜,亦唔需要瓣膜。
2007-03-25 11:01 pm
樓上唔好教錯人啦 pulmonary artery同aorta都有valve架 唔係得veins先有咖


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