for example, to the organs of the gut where digestion takes place,

就说是流进肠子这个消化场所吧
you have continual branching of these arteries

这些动脉不断地分支
until they become very fine.

直到变得十分细小
Those smallest conducting pathways are called arterioles,

最小的通路叫做细动脉
small arteries or arterioles.

小动脉或者细动脉
Now they have the same basic anatomy as an artery.

它们与动脉有相同的解剖学结构
They have a muscular wall

它们都有肌肉壁
and we'll talk about why that's important in a minute

待会我会讲为什么这很重要
and they don't conduct any nutrients across their surface,

任何养分都不会经动脉血管表面传递
they're just smaller.

细动脉只是相对较小
Eventually those arterioles branch into very fine vessels

这些细动脉最终会分成极小的血管
called capillaries.

叫做毛细血管