This template systematically demonstrates the core processing flow of the endoplasmic reticulum in cells, covering the endoplasmic reticulum, transport vesicles, exocytosis, endocytosis, lysosomes, etc. It is suitable for cell biology teaching, disease mechanism research (such as cystic fibrosis and neurodegenerative diseases), drug target development and biotechnology applications. The content strictly adheres to the standards of molecular cell biology.