血液為何不夠用

This episode is 19 minutes long.

This episode was published on April 15, 2026.

人體血管就像我們內建的「超狂公路網」！動脈是頂著心臟狂飆水壓的「高壓快車道」，管壁超厚又Q彈；微血管則是極度狹窄的「菜市場小巷」，讓血液擠進去跟周圍細胞熱血地交易氧氣與廢物。而靜脈則是慢吞吞的「低壓回程路」，因為血流推力太弱，只能靠骨骼肌的擠壓和自帶的「單向門（瓣膜）」硬是把血液對抗地心引力推回心臟。要是這扇單向門壞了導致血液大塞車逆流，你的腿上可是會浮出爆青筋的「靜脈曲張」喔！ 留言告訴我你對這一集的想法： Powered by Firstory Hosting

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