enlist every structure in the cell and understand its function separtely. 1) : selectively permeable,allows some particles to pass and stops other. does not give a definite shape ! 2)cytoplasm: its a floating medium 3) mitochondria : involved in ATP production 4) ribosomes : protein factories 5) endoplasmic reticulum : SMOOTH makes vesicles which are used to move things around in cell e.g hormones,enzymes. ROUGH has ribosomes on it. 6) vacuoles : numerous sacs for storage 7) golgi apparatus : packaging & modifying vesicles 8) nucleus : it has chromosomes having DNA on it.