In the body, cells move like flocks of birds or schools of fish
Biologists look to collective behavior of animals to help explain cell movement
![bird flock](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/12/121615_ti_cellmovement_free.jpg?fit=860%2C460&ssl=1)
TRAVEL TIPS Bird follow rules when flocking. Cells in the body migrate in groups following similar rules, cell biologists are discovering.
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