It would probably be the cytoplasm. I am a girl in the 6th grade and learned about cells and everything there is to know about them just three/four months ago. The cytoplasm is the jelly-like fluid inside a cell; which holds the organelles;such as mitochondria(mi-to-kon-dri-a), a vacuole, nucleus, ribosomes, lyssomes (i know i spelled it wrong!SD) and the endoplasmic reticulum etc. (look them up would you?). The organelles couldn't move around without the cytoplasm. The organelles are the materials! <)
Endoplasmic Reticulum
Transportation system
The mitochondria
endoplasmic reticulum
the process that moves wethe process that moves weathered materials athered materials
Endocytosis moves into cell Exocytosis moves out of cells ...
lysosomes lysosomes
it moves materials from areas of high concentration to areas of low concentrationit moves materials of high concentration to areas of low concentration
a beach
magnets
exocytosis
the need for new places to get raw materials