Vesicular transport is a cellular process that involves the movement of materials within small membrane-bound sacs called vesicles. These vesicles can transport proteins, lipids, and other molecules to different parts of the cell or even outside the cell. This process is essential for maintaining cellular functions and communication. There are two main types of vesicular transport: endocytosis and exocytosis. In endocytosis, the cell membrane engulfs external substances, forming a vesicle that brings materials into the cell. In exocytosis, vesicles fuse with the cell membrane to release their contents outside the cell, playing a crucial role in processes like hormone secretion and neurotransmission.