Food vacuoles are present in the posterior part.
"Marine Protozoa from Woods Hole" by Gary N. Calkins
The food vacuole (FV) contains ingested food.
"The Outline of Science, Vol. 1 (of 4)" by J. Arthur Thomson
The food-particle d has now been ingested by the vacuole.
"Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 4" by Various
Other vacuoles appear to be clear; these are spaces in which food has been digested.
"A Civic Biology" by George William Hunter
"This is the cell membrane, this is the cytoplasm, this is the nucleus, this is a food vacuole where food is digested, this is a waste product vacuole, these are pseudopods that move around and trap food".
PolyMedix's defensin-mimetics target the digestive vacuole of the parasite that causes malaria, Plasmodium falciparum, via a mechanism distinct from other anti-malarial agents, essentially starving the parasite of food.