Provided herein are methods of generating tissues and organs in vitro or ex vivo comprising depositing cells and extracellular matrix onto a surface, as well as methods of using such tissues and organs. In one embodiment, the cells and ECM used in accordance with the methods for generating tissues (e.g., three-dimensional tissues) and organs described herein are deposited as part of the same composition. In another embodiment, the cells and ECM used in accordance with the methods for generating tissues (e.g., three-dimensional tissues) and organs described herein are deposited as part of different compositions.
