Cell Theory..
all animals are composed of cells
The German biologist Theodor Schwann concluded that all animals are made up of cells, which contributed to the development of the cell theory. He also proposed that cells are the basic unit of structure and function in living organisms.
that all animals were made of cells
All living things are made of one or more cells.
to consider something alive (at least what i was taught) the organism has to replicate in the order DNA to RNA to Protein, cells are the smallest units that have this ability. virus have a different cycle typiclly going: modified RNA to DNA to RNA to Protein which is why they arent considered (yet) to being alive
He and Theodor Schwann came up with the 3 statements of cell theory. He and Theodor Schwann came up with the 3 statements of cell theory.
Theodore Schwann did not conclude all plants are made of cells. He concluded that all animals were made up of cells. However, Matthais Schlieden did conclude that all plants were made of cells. He concluded this in 1838.
The German scientist Theodor Schwann concluded that all animals are composed of cells, and that cells are the basic building blocks of living organisms. This idea laid the foundation for the cell theory, which states that all living things are composed of cells.
Schwann cells and oligodendrocytes
This questions has been answered below in the related discussions, "what are Schwann cells"
Schwann cells are glia that myelinate the neurons of the Peripheral Nervous System
The Remaining Schwann Cells schwann cells, after injury and disruption to target, the remaining schwann cells undergo a rapid mitotic division until the target tissue is reached and the successful pathway is regenerated under the structural guidance of the schwann cells,