How do body cells know where to go?
The destination of a migrating cell is determined by a combination of signals from the surrounding environment and specific genetic programs. When cells receive an appropriate signal, they become activated and begin to move towards the source of the signal.

Cells may respond to chemical gradients or mechanical cues, such as sheer forces created by blood flow or fluid movements, respectively. Additionally, cells can also be influenced by factors secreted by other nearby cells, such as hormones or growth factors.

Once a cell has received its cue, it begins to divide in order to produce new cells with specialized functions. Depending on the location the cell needs to travel to, it may follow a tortuous path through the body before reaching its target. During this process, cells communicate with each other via various signaling pathways, which help guide their movement and determine their final destination.

Overall, the migration of cells is a complex and regulated process that helps ensure the proper function of our bodies. Understanding how cells navigate their way through the body is key to understanding many diseases and medical conditions, including cancer metastasis and immune responses.