Hans and Zacharias Janssen were father and son. Around the 1590’s, Zacharias was known for the creation of the first compound microscope, but some believe that his father had some part of the creation as well. His microscope had the three objective lenses and an eyepiece. It was a very advanced microscope for the age. Zacharias also invented the first telescope. After all his hard work Janssen past away in 1638.
Robert Hooke was born in Freshwater, England in 1636. Robert Hooke was an architect, natural philosopher, an amazing scientist, And known for his law of elasticity. He went to school at Oxford and spent his career at the Royal Society and Gresham College. He is also famous for being the first person to use the word cells, coming from the latin word “cella”, which means small rooms. He also Ended up publishing a book “Micrographia” in 1665. That book was about his work using the microscope to write down observations of a lot of different samples. Hooke died in London in 1703.
Anton van Leeuwenhoek was born in Delft, Netherlands in 1632. Know one expected him to be a scientist since he came from a family of tradesman. He didn’t invent the microscope, but he did make it better by increasing the magnification. Then in 1674, he studied algae and animalcules. Because of his findings, he is often considered the as the father of microbiology. Leeuwenhoek died in 1723.
Matthias Schleiden was born in Germany in 1804. He focused on botany, The part of biology that studies plants. One of Schleiden’s achievements was writing “Contributions to Phytogenesis” in 1838. Schleiden said that all plants are composed of cells and that the most basic unit of plant life is the cell. He was also known for recognizing the importance of the cell nucleus. After his discoveries and achievements he died in 1881.
Theodor Schwann was born in Germany in 1810. He was a German Physiologist. A physiologist is a scientist who studies living organisms. Schwann has a cell named after him. It is named after him because he discovered that cell and that cell is the cell that outline and shelter the axons of the nerve cells. He also brought Matthias Schleiden work deeper and applied it to the Cell Theory and his book “Microscopical Researches Into the Accordance in the Structure and Growth of Animals and Plants” published in 1839. After he amazed the world, Theodor Schwann past away in 1882.
Rudolph Virchow was born in Germany in 1821. He was a German Doctor. The reason he is a part of the Cell Theory is because he explained how the organs and tissues of the body got infected by the disease. He is also known for how he recognized that in all living things the basic unit of structure and function is the cell, in 1858. Another one of his big discoveries he made was recognizing leukemia first. After all, he discovered he died in 1902.