Synexpression is when things in our body work together. Imagine you and your friends all working together to build a big tower out of blocks. When you work together, you all have to use your hands and your brains to make sure the tower doesn't fall down. That's like how synexpression works in our body. Different parts of our body, like our organs and cells, work together to keep us healthy. They all have to do their jobs just right so that everything works properly. It's like a big team where everyone has to work together to win the game. Without synexpression, our body couldn't work properly, just like how the tower wouldn't stand up if only one person was building it.