transcytosis

Transcytosis is a process where cells transport substances across their entire structure. The substance enters the cell on one side, travels through the interior in small vesicles, and then exits on the other side. This mechanism allows cells to move molecules, proteins, or fluids between different environments, like from blood vessels to surrounding tissues or vice versa. It is essential for functions such as nutrient absorption, immune responses, and maintaining barriers like the blood-brain barrier, ensuring that necessary substances reach where they are needed without compromising the cell’s integrity.