CELL THEORY
Storyboard Text
- Our narrative begins with cells, which are the building blocks of all living beings. Here's some background information:
- All living organisms are composed of one or more cells. The cell is the basic unit of structure and organization in organisms. Cells arise from pre-existing cells.
- Let me now present you to the scientists who contributed to the development of the cell theory.
- Let us begin by getting to know Robert Hooke. Robert Hooke discovered small boxlike cavities while observing cork with his microscope, which he illustrated and described as cells. He had discovered plant cells. Hooke's discovery led to the understanding of cells as the smallest units of life—the foundation of cell theory.
- Second, information about Hans and Zacharias Janssen. In the late 16th century, a Dutch father-son team named Hans and Zacharias Janssen discovered that by placing a lens at the top and bottom of a tube and looking through it, objects on the other end could be magnified. "It was much better with the hand lenses."
- Third, Anton van Leeuwenhoek made the first observations of bacteria and protozoa using single-lens microscopes he invented. His considerable research on the growth of tiny creatures like fleas, mussels, and eels contributed to the debunking of the notion of spontaneous generation of life.Van Leeuwenhoek established the basis of plant anatomy and became an expert in animal reproduction in addition to being the father of microbiology. He examined the structure of wood and crystals and discovered blood cells and microscopic nematodes.
- Matthias Schleiden, fourth. In 1838, German botanist Matthias Schleiden came to the conclusion that all plant tissues are composed of cells, and that each embryonic plant is composed of just one cell. Plants were formed up of recognizable units, or cells, according to Schlieden, who investigated them microscopically.
- Theodor Schwann demonstrated the same phenomenon in animal tissues, concluding in 1839 that all tissues are composed of cells, this laid the foundations for the cell theory.
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