Difference between revisions of "Cell"

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A '''cell''' is the basic [[structural]] and [[function]]al unit of all known living [[organisms]]. It is the smallest unit of an organism that is classified as a living [[thing]], and is often called the building block of life.[1] Some organisms, such as most bacteria, are unicellular (consist of a single cell). Other organisms, such as [[humans]], are multicellular. (Humans have an estimated 100 trillion or 10 ¹⁴ cells; a typical cell size is 10 [http://en.wikipedia.org/wiki/Micrometre µm]; a typical cell mass is 1 [http://en.wikipedia.org/wiki/Nanogram nanogram].) The largest known cell is an unfertilized ostrich egg cell.[2]
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A '''cell''' is the basic [[structural]] and [[function]]al unit of all known living [[organisms]]. It is the smallest unit of an organism that is classified as a living [[thing]], and is often called the building block of life.[1] Some organisms, such as most bacteria, are unicellular (consist of a single cell). Other organisms, such as [[humans]], are multicellular. (Humans have an estimated 100 trillion or 10 ¹⁴ cells; a typical cell size is 10 [https://en.wikipedia.org/wiki/Micrometre µm]; a typical cell mass is 1 [https://en.wikipedia.org/wiki/Nanogram nanogram].) The largest known cell is an unfertilized ostrich egg cell.[2]
  
In 1835 before the final cell theory was developed, [http://en.wikipedia.org/wiki/Jan_Evangelista_Purkyně Jan Evangelista Purkyně] observed small "granules" while looking at the plant tissue through a microscope. The [http://en.wikipedia.org/wiki/Cell_theory cell theory], first developed in 1839 by Matthias Jakob Schleiden and Theodor Schwann, states that all organisms are composed of one or more cells, that all cells come from preexisting cells, that vital [[function]]s of an organism occur within cells, and that all cells contain the hereditary information [[necessary]] for regulating cell functions and for [[transmitting]] [[information]] to the next generation of cells.[3]
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In 1835 before the final cell theory was developed, [https://en.wikipedia.org/wiki/Jan_Evangelista_Purkyně Jan Evangelista Purkyně] observed small "granules" while looking at the plant tissue through a microscope. The [https://en.wikipedia.org/wiki/Cell_theory cell theory], first developed in 1839 by Matthias Jakob Schleiden and Theodor Schwann, states that all organisms are composed of one or more cells, that all cells come from preexisting cells, that vital [[function]]s of an organism occur within cells, and that all cells contain the hereditary information [[necessary]] for regulating cell functions and for [[transmitting]] [[information]] to the next generation of cells.[3]
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The word cell comes from the Latin cellula, [[meaning]], a small room. The descriptive term for the smallest living biological [[structure]] was coined by [https://en.wikipedia.org/wiki/Robert_Hooke Robert Hooke] in a [[book]] he published in 1665 when he compared the cork cells he saw through his microscope to the small rooms [[monks]] lived in.[4][https://en.wikipedia.org/wiki/Cell_(biology)]
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==Quote==
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You are a single living '''cell''' in a gigantic [[body]]. As such, you are carried along by life itself. On the [[physical]] of [[existence]], you know of the size of the [[Master Universe|universe]] and its [[motions]]. Yet within this almost [[absolute]] regularity, there is something of the next [[moment]] that [[our Father]] creates afresh and new. The living body of [[God]] continues to [[grow]]. And as you continue to grow, you can have this [[choice]] of what you will become. This is not [[foreordained]]. This is a true choice and you make it moment by [[moment]], day by day.[https://nordan.daynal.org/wiki/index.php?title=You_Can_Grow_Without_Limit-2004-11-15]
  
The word cell comes from the Latin cellula, [[meaning]], a small room. The descriptive term for the smallest living biological [[structure]] was coined by [http://en.wikipedia.org/wiki/Robert_Hooke Robert Hooke] in a [[book]] he published in 1665 when he compared the cork cells he saw through his microscope to the small rooms [[monks]] lived in.[4][http://en.wikipedia.org/wiki/Cell_(biology)]
 
 
==References==
 
==References==
 
# Cell Movements and the Shaping of the Vertebrate Body in Chapter 21 of Molecular Biology of the Cell fourth edition, edited by Bruce Alberts (2002) published by Garland Science.
 
# Cell Movements and the Shaping of the Vertebrate Body in Chapter 21 of Molecular Biology of the Cell fourth edition, edited by Bruce Alberts (2002) published by Garland Science.
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# "... I could exceedingly plainly perceive it to be all perforated and porous, much like a Honey-comb, but that the pores of it were not regular [..] these pores, or cells, [..] were indeed the first microscopical pores I ever saw, and perhaps, that were ever seen, for I had not met with any Writer or Person, that had made any mention of them before this. . ." – Hooke describing his observations on a thin slice of cork. Robert Hooke
 
# "... I could exceedingly plainly perceive it to be all perforated and porous, much like a Honey-comb, but that the pores of it were not regular [..] these pores, or cells, [..] were indeed the first microscopical pores I ever saw, and perhaps, that were ever seen, for I had not met with any Writer or Person, that had made any mention of them before this. . ." – Hooke describing his observations on a thin slice of cork. Robert Hooke
 
==External links==
 
==External links==
* [http://publications.nigms.nih.gov/insidethecell/ Inside the Cell]
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* [https://publications.nigms.nih.gov/insidethecell/ Inside the Cell]
* [http://vcell.ndsu.nodak.edu/animations/ Virtual Cell's Educational Animations]
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* [https://vcell.ndsu.nodak.edu/animations/ Virtual Cell's Educational Animations]
* [http://www.studiodaily.com/main/searchlist/6850.html The Inner Life of A Cell], a flash video showing what happens inside of a cell  
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* [https://www.studiodaily.com/main/searchlist/6850.html The Inner Life of A Cell], a flash video showing what happens inside of a cell  
* [http://www.ibiblio.org/virtualcell/tour/cell/cell.htm The Virtual Cell]
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* [https://www.ibiblio.org/virtualcell/tour/cell/cell.htm The Virtual Cell]
* [http://www.cellsalive.com/ Cells Alive!]
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* [https://www.cellsalive.com/ Cells Alive!]
* [http://www.jcb.org/ Journal of Cell Biology]
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* [https://www.jcb.org/ Journal of Cell Biology]
* [http://www.biology.arizona.edu/cell_bio/cell_bio.html The Biology Project > Cell Biology]
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* [https://www.biology.arizona.edu/cell_bio/cell_bio.html The Biology Project > Cell Biology]
* [http://www.centreofthecell.org/ Centre of the Cell online]
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* [https://www.centreofthecell.org/ Centre of the Cell online]
* [http://cellimages.ascb.org/ The Image & Video Library of The American Society for Cell Biology], a collection of peer-reviewed still images, video clips and digital books that illustrate the structure, function and biology of the cell.
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* [https://cellimages.ascb.org/ The Image & Video Library of The American Society for Cell Biology], a collection of peer-reviewed still images, video clips and digital books that illustrate the structure, function and biology of the cell.
* Gall JG, McIntosh JR, eds  (2001). ''[http://cellimages.ascb.org/cdm4/browse.php?CISOROOT=/p4041coll11 Landmark Papers in Cell Biology]''.  Bethesda, MD and Cold Spring Harbor, NY: The American Society for Cell Biology and Cold Spring Harbor Laboratory Press; 2001. Commentaries and links to original research papers published in the ASCB Image & Video Library
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* Gall JG, McIntosh JR, eds  (2001). ''[https://cellimages.ascb.org/cdm4/browse.php?CISOROOT=/p4041coll11 Landmark Papers in Cell Biology]''.  Bethesda, MD and Cold Spring Harbor, NY: The American Society for Cell Biology and Cold Spring Harbor Laboratory Press; 2001. Commentaries and links to original research papers published in the ASCB Image & Video Library
  
 
[[Category: Biology]]
 
[[Category: Biology]]

Latest revision as of 23:42, 12 December 2020

Lighterstill.jpg

Cells.jpg

A cell is the basic structural and functional unit of all known living organisms. It is the smallest unit of an organism that is classified as a living thing, and is often called the building block of life.[1] Some organisms, such as most bacteria, are unicellular (consist of a single cell). Other organisms, such as humans, are multicellular. (Humans have an estimated 100 trillion or 10 ¹⁴ cells; a typical cell size is 10 µm; a typical cell mass is 1 nanogram.) The largest known cell is an unfertilized ostrich egg cell.[2]

In 1835 before the final cell theory was developed, Jan Evangelista Purkyně observed small "granules" while looking at the plant tissue through a microscope. The cell theory, first developed in 1839 by Matthias Jakob Schleiden and Theodor Schwann, states that all organisms are composed of one or more cells, that all cells come from preexisting cells, that vital functions of an organism occur within cells, and that all cells contain the hereditary information necessary for regulating cell functions and for transmitting information to the next generation of cells.[3]

The word cell comes from the Latin cellula, meaning, a small room. The descriptive term for the smallest living biological structure was coined by Robert Hooke in a book he published in 1665 when he compared the cork cells he saw through his microscope to the small rooms monks lived in.[4][1]

Quote

You are a single living cell in a gigantic body. As such, you are carried along by life itself. On the physical of existence, you know of the size of the universe and its motions. Yet within this almost absolute regularity, there is something of the next moment that our Father creates afresh and new. The living body of God continues to grow. And as you continue to grow, you can have this choice of what you will become. This is not foreordained. This is a true choice and you make it moment by moment, day by day.[2]

References

  1. Cell Movements and the Shaping of the Vertebrate Body in Chapter 21 of Molecular Biology of the Cell fourth edition, edited by Bruce Alberts (2002) published by Garland Science.

The Alberts text discusses how the "cellular building blocks" move to shape developing embryos. It is also common to describe small molecules such as amino acids as "molecular building blocks".

  1. Campbell, Neil A.; Brad Williamson; Robin J. Heyden (2006). Biology: Exploring Life. Boston, Massachusetts: Pearson Prentice Hall. ISBN 0-13-250882-6.
  2. Maton, Anthea; Hopkins, Jean Johnson, Susan LaHart, David Quon Warner, Maryanna Wright, Jill D (1997). Cells Building Blocks of Life. New Jersey: Prentice Hall. ISBN 0-13-423476-6.
  3. "... I could exceedingly plainly perceive it to be all perforated and porous, much like a Honey-comb, but that the pores of it were not regular [..] these pores, or cells, [..] were indeed the first microscopical pores I ever saw, and perhaps, that were ever seen, for I had not met with any Writer or Person, that had made any mention of them before this. . ." – Hooke describing his observations on a thin slice of cork. Robert Hooke

External links