IPA: /ˈɛndəʊsɑːk/
KK: /ˈɛndəˌsɑrk/
The soft, fluid part inside certain single-celled organisms, like the inner layer of the cell in an amoeba.
The endosarc of the amoeba contains various organelles necessary for its survival.
Endosarc is formed from "endo-" (meaning within) and "sarc-" (from Greek "sarkos", meaning flesh). The word refers to the inner part of a cell or organism that is fleshy or cellular in nature.
Think of 'endo-' meaning 'within' and 'sarc-' relating to 'flesh' — this helps you remember that endosarc refers to the fleshy inner part of a cell.