Cell Structure & Function: Sec. 1: The Discovery of Cells
Nitty Gritty Science・3 minutes read
Robert Hooke discovered cells in cork slices, leading to the cell theory supported by other scientists, including the idea that all living organisms are made up of cells. Advancements in microscopy, like electron microscopes, have allowed scientists to observe cell structures in detail, categorizing them into prokaryotes and eukaryotes with unique functions and benefits.
Insights
- Robert Hooke discovered cells in cork using a microscope, leading to the cell theory developed by Virchow, Schleiden, and Schwann, which states that all living organisms are made of cells, cells are the basic units of structure and function, and cells arise from pre-existing cells.
- Electron microscopes like SEMs and TEMs have enabled detailed observation of cell organelles, distinguishing prokaryotic cells (lacking membrane-bound organelles) from eukaryotic cells (containing membrane-bound organelles) found in diverse organisms, allowing for intricate chemical reactions within different parts of eukaryotic cells.
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Recent questions
What did Robert Hooke discover?
Cells
Who contributed to the cell theory?
Rudolph Virchow, Matthias Schleiden, Theodore Schwann
What are the two categories of cells?
Prokaryotes and eukaryotes
What advancements in microscopy helped observe cells in detail?
Electron microscopes like SEMs and TEMs
What is the significance of cells in living organisms?
Basic units of structure and function
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Summary
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The Discovery and Diversity of Cells
- Robert Hooke used a microscope to observe cork slices, identifying cell structures that he named "cells," which are the fundamental units of living organisms. Later, scientists like Rudolph Virchow, Matthias Schleiden, and Theodore Schwann contributed to the cell theory, stating that all living things are composed of cells, cells are the basic units of structure and function, and all cells come from other cells.
- Advancements in microscopy, particularly with electron microscopes like SEMs and TEMs, have allowed scientists to observe cells in great detail, revealing organelles with specific functions. Cells are categorized into prokaryotes (lacking membrane-bound organelles like bacteria) and eukaryotes (possessing membrane-bound organelles like protists, fungi, plants, and animals), with the latter benefiting from simultaneous chemical reactions in different cell parts.
