關唔關pulmonary arteries 同pulmonary veins 事？
but lung is an organ which is formed by cells, there should be a supply of nutrients , oxygen etc. by the blood for the lungs, shouldn't there?
我想問有冇blood vessels supply for the lung! (10 points!!!!!)
2007-05-31 4:24 am
回答 (2)
2007-05-31 4:37 am
✔ 最佳答案
The pulmonary artery drains deoxygenated blood to the lungs.After gaseous exchange the blood becomes oxygenated and has more oxygen and less carbon dioxide. It flows out of the lungs by pulmonary veins to the heart.
參考: Biology notes
2007-06-01 1:21 am
沒有
就只是pulmonary artery 同pulmonary vein
進出肺部
入肺的血管雖然是缺氧血
但是帶有營養供給肺部
出肺的血管帶走代謝廢物
而肺組織的氣體交換僅通過肺內微血管即可完成
不過若肺的若干血管受阻
則依然會使組織缺氧壞死
這稱為肺柱塞
嚴重時可以致命
就只是pulmonary artery 同pulmonary vein
進出肺部
入肺的血管雖然是缺氧血
但是帶有營養供給肺部
出肺的血管帶走代謝廢物
而肺組織的氣體交換僅通過肺內微血管即可完成
不過若肺的若干血管受阻
則依然會使組織缺氧壞死
這稱為肺柱塞
嚴重時可以致命
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