# How do animals make shells? # How do animals make shells [YouTube](https://www.youtube.com/watch?v=iUeMxjkSPyM) - shells are made of minerals in the same structures as natural minerals - cells act as ‘seeds’ [Web URL for this note](http://notes.benjaminreinhardt.com/How+do+animals+make+shells) [Comment on this note](http://via.hypothes.is/http://notes.benjaminreinhardt.com/How+do+animals+make+shells)