Help with drawing irregular spheres with grids

[synaptin]

I am trying to make a scientific illustration that shows spheres made up of irregular sized cells. Something similar to the examples below: 

I can draw the right image relatively easy using pattern brushes, but the left one (the ball of cells) has been a complete disaster so far (i am relatively new to Illustrator and still have a lot to learn).

Can someone maybe direct me to the best way to go about drawing this? 

Any help will be immensely appreciated! 

[Kurt Gold · Accepted solution]

You may draw it manually with the Pen tool.

You could also draw a filled path (circle), apply Effect menu > Texture > Stained Glass, expand the appearance (see Object menu), trace the raster image manually or automatically. Then use Live Paint or the Shape Builder tool to fill the cells.

[Ton Frederiks · Accepted solution]

And maybe comboMover could be useful too:

https://twitter.com/shspage_en/status/1218718622945701888

[synaptin]

Thanks a lot for the suggestions! 

I am getting the best results with the "stained glass" effect, but will also try the comboMover.  

Drawing with the Pen is the best suggestion of ccourse, but i think i am just too bad/impatient in drawing to produce anything worth keeping...