What part of the cell serves as the intracellular highway?
Endoplasmic reticulum
Endoplasmic reticulum serves to process, package and export proteins. It is an essential part of the protein sorting system, which includes the correct folding of proteins and marking with amino acids that work as an address tag. Proteins are taken to their respective targets based on these tags. So, they are referred to as an intracellular highway. Endoplasmic reticulum also provides shape and firmness to the cell.