静脉曲张是一种主要影响人类的疾病，源于双足行走的挑战。直立的姿势，加上重力和遗传易感性，导致腿部静脉扩张。长颈鹿尽管身高很高，但已经进化出独特的机制来管理血流并防止这个问题。 AI
排序理由 文章讨论了一种生物现象，重点关注人类生理学和进化适应性，而非核心AI主题。
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生物学家解释人类静脉曲张和长颈鹿的适应性
本文如何被排名
- Signal score
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- 文章讨论了一种生物现象，重点关注人类生理学和进化适应性，而非核心AI主题。
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完整方法见我们的编辑标准。
报道来源 [1]
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一位生物学家解释了为什么人类会有静脉曲张（提示：没有四足动物有这个问题）
Varicose veins are a largely human problem. Here’s how walking upright, gravity and your genes stretch leg veins — and what giraffes do differently.