Help with identifying cell parts

[Faze_HomeDepot]

I was given an assignment where I have to look at a picture of a cell and identify the parts selected. I am only missing one part unidentified and I can't research it online. 

 

All the parts that need to be identified have letters associated with it. I can't find what part "F" is. 

 

[muskan]

i think centriole

[RadioactiveDecay]

possibly a vacuole or a lysosome

for "C" you could also add "nuclear membrane", that's the layer surrounding the nucleus/nucleolus

Edited November 15, 2018 by RadioactiveDecay