YOU SAID:
The largest blood vessels are connected to it running to and from.
INTO JAPANESE
最も大きな血管はそれに接続されており、行き来しています。
BACK INTO ENGLISH
The largest blood vessels are connected to it and travel back and forth.
INTO JAPANESE
最大の血管がそれに接続されており、行き来しています。
BACK INTO ENGLISH
The largest blood vessels are connected to it and travel back and forth.
That didn't even make that much sense in English.