The morphology and position of the AV node and AV bundle were observed in 13 human hearts with serial sections.

本文对13例人心标本房室结和房室束的形态及位置，作了连续切片观察。

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The septal branches course medially and supply the majority of the interventricular septum, as well as the atrioventricular (AV) bundle and proximal bundle branch (Fig 3) (7).

室间隔支供应室间隔的大部分、房室束和左右束支近段（图3）。

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Apparently, the AV center is the mystery box on the shelf below the PDP in the picture above which will magically bundle the various signals from your tethered devices such as DVD, set-top box, etc. and then feed 'em up to the TV over 802.11a WiFi.

ENGADGET: Samsung's 50-inch PDP brings wireless HD