Extracting PNG vector graphics from Word.doc do***ents?

I'm being sent some tech re****ts in Word.doc format that contain 
illustrations that were clearly created originally as vector graphics, 
and are now (apparently) in PNG format.

Can I extract some of these graphics in such a way that their vector 
character is preserved, and they can be edited in Illustrator or other 
vector graphics programs?

I think these graphics must retain some kind of vector information in 
the Word do***ent, rather than just being stored as raster graphics, 
because if I blow them way up on screen in Word the lines and text 
labels remain sharp and unpixelated.

But if I Select, Copy and Paste individual figures from the Word 
do***ent into Illustrator do***ents they seem to be raster only -- or at 
least individual objects in the figures are not selectable.

If I print the do***ent to PDF, then Extract the figures from the PDF 
do***ent, they sometimes seems to come out as vector images -- but I'm 
not certain about this.

Acrobat has an "Ex****t Images" menu command that allows you to pull 
images out of a PDF do***ent.  Is there such a thing in Word? (I've not 
found such.)

GraphicConverter likely to be helpful here?

Word 2004 for Mac v. 11.2.