https://padlet.com/pchauhan1/honorsbiocelltheorytimeline By: Parthivi Chauhan, Aishee Goswami, Safa Biradar, and Arnav Chanchala en-us 2020-10-26 12:57:47 UTC 2020-10-27 20:12:46 UTC hello@padlet.com pchauhan1 https://padlet.com/pchauhan1/honorsbiocelltheorytimeline/wish/863895628 *The image above is what he saw in his microscope.*]]> 2020-10-26 23:41:28 UTC https://padlet.com/pchauhan1/honorsbiocelltheorytimeline/wish/863895628 pchauhan1 https://padlet.com/pchauhan1/honorsbiocelltheorytimeline/wish/863896215 - British scientist
- The 1st person to observe cells
- The cork cells he observed were dead
- He used an early compound microscope (not very strong at the time but it worked)
- He observed a thin slice of cork and saw tiny room-like units; he named them cells
- He published his observations in a book titled Micrographia in 1665
- His observations helped lead to the theory that all organisms are made up of cells]]> 2020-10-26 23:41:51 UTC https://padlet.com/pchauhan1/honorsbiocelltheorytimeline/wish/863896215 pchauhan1 https://padlet.com/pchauhan1/honorsbiocelltheorytimeline/wish/863903157 - The 1st person to challenge the theory of spontaneous generation
- In 1668, he proved that maggots come from the eggs that flies lay and not due to spontaneous generation]]> 2020-10-26 23:46:15 UTC https://padlet.com/pchauhan1/honorsbiocelltheorytimeline/wish/863903157 pchauhan1 https://padlet.com/pchauhan1/honorsbiocelltheorytimeline/wish/863906525 - He was from Holland
- He crafted lenses
- He made a very strong single-lens microscope in 1674]]> 2020-10-26 23:48:38 UTC https://padlet.com/pchauhan1/honorsbiocelltheorytimeline/wish/863906525 pchauhan1 https://padlet.com/pchauhan1/honorsbiocelltheorytimeline/wish/863912627 - He looked for cells in other substances like plaque or human blood
- He discovered animalcules (unicellular organisms) in 1683
- His observations helped lead to the theory that all organisms (no matter how big or small) are made up of cells]]> 2020-10-26 23:52:35 UTC https://padlet.com/pchauhan1/honorsbiocelltheorytimeline/wish/863912627 pchauhan1 https://padlet.com/pchauhan1/honorsbiocelltheorytimeline/wish/863920494 - He had a different theory of evolution than Darwin
- He believed that simple life forms come from dead matter, and that these forms evolve in an “upward” direction, becoming more complex and “perfect”
- He believed that species didn’t die out in extinctions, they just changed into another species
- He also believed that if organisms change DURING their life, those changes are passed onto their offspring
- In 1801, he published his views]]> 2020-10-26 23:57:35 UTC https://padlet.com/pchauhan1/honorsbiocelltheorytimeline/wish/863920494 pchauhan1 https://padlet.com/pchauhan1/honorsbiocelltheorytimeline/wish/863927667 - Their studies on tissues (in 1839) helped lead to the theory that cells are the building blocks of life, and all organisms are made of one or more cells
- Schwann studied animals (he was a zoologist)
- Schleiden studied plants (he was a botanist)]]> 2020-10-27 00:02:18 UTC https://padlet.com/pchauhan1/honorsbiocelltheorytimeline/wish/863927667 pchauhan1 https://padlet.com/pchauhan1/honorsbiocelltheorytimeline/wish/863933739 - In 1855, he said that all cells come from preexisting cells
- He used this theory as the foundation for cellular pathology
- Cellular pathology: the study of a disease at a cellular level
- Before his findings, people believed that new cells were formed from blastema (a type of fluid)
- There is also some evidence that he may have plagiarized the work of Robert Remak]]> 2020-10-27 00:06:00 UTC https://padlet.com/pchauhan1/honorsbiocelltheorytimeline/wish/863933739 pchauhan1 https://padlet.com/pchauhan1/honorsbiocelltheorytimeline/wish/863937850 - His observations helped lead to the theory that all cells come from preexisting cells
- He conducted an experiment in 1859 and concluded that bacteria only grows in broth if the broth is exposed to air
- He disproved the theory of spontaneous generation]]> 2020-10-27 00:08:41 UTC https://padlet.com/pchauhan1/honorsbiocelltheorytimeline/wish/863937850 pchauhan1 https://padlet.com/pchauhan1/honorsbiocelltheorytimeline/wish/863940930 *The image above is a painting of Pasteur in his lab.*]]> 2020-10-27 00:10:42 UTC https://padlet.com/pchauhan1/honorsbiocelltheorytimeline/wish/863940930 pchauhan1 https://padlet.com/pchauhan1/honorsbiocelltheorytimeline/wish/863944297 - They designed the first electron microscope in 1937]]> 2020-10-27 00:12:57 UTC https://padlet.com/pchauhan1/honorsbiocelltheorytimeline/wish/863944297 pchauhan1 https://padlet.com/pchauhan1/honorsbiocelltheorytimeline/wish/863949330 In 1938, Hillier created another electron microscope which:
- gave extremely clear images
- passed a beam of electrons through a specimen (rather than a beam of light) to view it
- could magnify an object up to 7,000 times and later improved to 10,000 times]]> 2020-10-27 00:15:53 UTC https://padlet.com/pchauhan1/honorsbiocelltheorytimeline/wish/863949330 pchauhan1 https://padlet.com/pchauhan1/honorsbiocelltheorytimeline/wish/863976344 *Here is a link to a Google Document with our sources.*
https://docs.google.com/document/d/1GGaetq7123JFSo6-pm3F2x8ZPEQQSIs4DASfYba9-LU/edit?usp=sharing]]> 2020-10-27 00:30:37 UTC https://padlet.com/pchauhan1/honorsbiocelltheorytimeline/wish/863976344 pchauhan1 https://padlet.com/pchauhan1/honorsbiocelltheorytimeline/wish/866735096 *The image above is a model of Leeuwenhoek's microscope.*]]> 2020-10-27 17:19:19 UTC https://padlet.com/pchauhan1/honorsbiocelltheorytimeline/wish/866735096 pchauhan1 https://padlet.com/pchauhan1/honorsbiocelltheorytimeline/wish/867093070 *The image above is Hillier and his microscope.*]]> 2020-10-27 18:34:00 UTC https://padlet.com/pchauhan1/honorsbiocelltheorytimeline/wish/867093070