What are the constituent elements of all living things? This centuries old question was answered only in the 1660s when scientists Anton Van Leeuwenhoek and Robert Hooke discovered cells and their parts.
While observing a piece of cork, Hooke noticed that it was made of small structures that reminded him of individual rooms. What appeared like rooms to him were called cells. Meanwhile, Anton Van Leeuwenhoek studied substances such as blood and saliva under the microscope. Within these, he observed tiny parts which he named “animalcules” as they resembled animals.
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