Re: How are the cells in an embryo held together?

  Hi there.  Cells in the early embryo are held together in the same ways 
that cells in our body are held together as adults.  There are special 
proteins on the outside of the cells that act like velcro and stick them to 
each other.  There are a bunch of different proteins that all do some of the 
same sorts of jobs.  Cadherins and Integrins are two of the main type of 
adhesion (velcro-like) proteins that are responsible for holding cells 
together.