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Robert HookeThe cell was discovered by Robert Hooke in 1665, who named the biological unit for its resemblance to cells inhabited by Christian monksin a monastery.
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Multicellular organism
Multicellular organisms are organisms that consist of more than one cell, in contrast to Unicellular organisms.
All species of animals, land plants and filamentous fungi are multicellular, as are many algae while a few organisms are partially uni- and partially multicellular, like slime moulds and social amoebae such as the genus Dictyostelium. |
organelleIn cell biology, an organelle is a specialized subunit within a cell that has a specific function. Individual organelles are usually separately enclosed within their own lipid bilayers.The name organelle comes from the idea that these structures are to cells what an organ is to the body (hence the name organelle, the suffix -elle being a diminutive). Organelles are identified by microscopy, and can also be purified by cell fractionation. There are many types of organelles, particularly in eukaryotic cells. While prokaryotes do not possess organelles per se, some do contain protein-based microcompartments, which are thought to act as primitive organelles.
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