Here are some of the key points from their conclusions:

* All living things are composed of cells.

* Cells are the smallest unit of life that can exist independently.

* Cells come from pre-existing cells.

* All cells have a cell membrane, cytoplasm, and DNA.

* Plants cells contain chloroplasts, while animal cells do not.

* Animal cells contain centrioles, while plant cells do not.

These conclusions were based on their observations of plant and animal tissue under a microscope. They were able to see that cells were the basic building blocks of all living things, and that they had certain common features, such as a cell membrane, cytoplasm, and DNA.

Their conclusions were revolutionary at the time, as they overturned the prevailing belief that all living things were made up of tiny, indivisible particles called "monads." Schleiden and Schwann's work laid the foundation for the modern field of cell biology, and their conclusions are still considered to be fundamental principles of biology today.