Which term describes an extensive network of tubes sacs, and vesicles throughout a cell that provides transport as its main function? cell membrane endoplasmic reticulum centriole cell wall

## Step 1<br />The question is asking for the term that describes an extensive network of tubes, sacs, and vesicles throughout a cell that provides transport as its main function. The options provided are cell membrane, endoplasmic reticulum, centriole, and cell wall.<br /><br />## Step 2<br />The cell membrane is the biological membrane that separates the interior of all cells from the outside environment. It is not primarily involved in transport.<br /><br />## Step 3<br />The endoplasmic reticulum is an extensive network of tubes and sacs within the cell that is involved in the transport of materials. It is the correct answer.<br /><br />## Step 4<br />The centriole is a component of the cytoskeleton in eukaryotic cells, involved in the organization of microtubules and in cell division. It is not primarily involved in transport.<br /><br />## Step 5<br />The cell wall is a rigid layer that is found outside the cell membrane and provides structural support to the cell. It is not primarily involved in transport.