AP BIOLOGY

Detailed explanation-1: -Many scientists believed that animals were made of “globules.” German scientists Theodore Schwann and Mattias Schleiden studied cells of animals and plants respectively.

Detailed explanation-2: -Theodor Schwann, (born December 7, 1810, Neuss, Prussia [Germany]-died January 11, 1882, Cologne, Germany), German physiologist who founded modern histology by defining the cell as the basic unit of animal structure.

Detailed explanation-3: -Matthias Jacob Schleiden was a German botanist who, with Theodor Schwann, cofounded the cell theory. In 1838 Schleiden defined the cell as the basic unit of plant structure, and a year later Schwann defined the cell as the basic unit of animal structure.

Detailed explanation-4: -Theodor Schwann is most famous for his role in the development of cell theory. Theodor Schwann was a German zoologist famous for his development of the cell theory, identification of pepsin, discovery of Schwann cells and his disproving of spontaneous generation.

Detailed explanation-5: -Both Schleiden and Schwann studied cell theory and phytogenesis, the origin and developmental history of plants. They aimed to find a unit of organisms common to the animal and plant kingdoms. They began a collaboration, and later scientists often called Schleiden and Schwann the founders of cell theory.