JeSsRockiT (asker) May 15, 2011:

chapeau!

Odded Leon May 14, 2011:

Google and Wikipedia... I first looked for צרורות הובלה and saw they had to do with xylem and phloem, then I searched for Xylem to see what kind of structures it appears in and sure enough under "structure" in the xylem page it said it appears in vascular bundles. I followed that link which gave an explanation close enough for me for what I read about the Hebrew term. It also said it's a characteristic of vascular plants so I made sure Avocado was a vascular plant...