schleiden found all plants to be made of cells in 1838 and schwann found all animals to be made up of cell in 1839. so together anouncing it, it would be 1839...
http://wiki.answers.com/Q/When_did_Schleiden_and_Schwan...
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In 1838, Theodor Schwann and Matthias Schleiden were enjoying after-dinner coffee and talking about their studies on cells. It has been suggested that when Schwann heard Schleiden describe plant cells with nuclei, he was struck by the similarity of these plant cells to cells he had observed in animal tissues.
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www.bio.miami.edu/~cmallery/150/unity/cell.text.htm
www.bio.miami.edu/~cmallery/150/unity/cell.text.htm
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The diligent work and close observations of hundreds of scientists revealed the presence of cells in all living bodies. This led Theodor Schwann (1839), a zoologist, and Matthias Schleiden, a botanist, to conclude that all life is composed of cells.
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www.madsci.org/posts/archives/oct99/940859322.Cb.r.html
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The cell theory developed by Schleiden and Schwann in 1839 hastened our knowledge of embryology and provided for the realization that a spermatozoon fuses with an oocyte ("egg") and forms a zygote, the single celled embryo, which then divides and adds more cells and tissues in defining the developing body.
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www.lifeissues.net/writers/kisc/kisc_04whenlifebegins1....
www.lifeissues.net/writers/kisc/kisc_04whenlifebegins1.html
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keep in mind that the cell theory of Schleiden and Schwann, that all living organisms are composed of cells and cells are the basic building blocks of tissues, dates from 1838-39. Self-improvement, inheritance of acquired improvements, and progress are also themes of this passage ... one is led to conclude, that they have...
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darwin.baruch.cuny.edu/biography/erasmus_darwin/zoonomi...
darwin.baruch.cuny.edu/biography/erasmus_darwin/zoonomia.html
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It is a view of life such that life is defined as the aggregation of cells. This is a deductive rule, ... These Udagawa's books were 3 or 4 years prior to Schleiden's famous article in 1838, which includes the first declaration of cell theory as principle in botany. ... In this section, we can conclude the following:
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www.ns.kogakuin.ac.jp/~ft12153/doc/japacell.html
www.ns.kogakuin.ac.jp/~ft12153/doc/japacell.html
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C. The student will conclude that cells exist within a narrow range of environmental conditions and changes to that environment, either naturally occurring or induced, may cause changes in the metabolic activity of the cell or organism. ... c. Schleiden and Schwann...
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www.fastol.com/~renkwitz/10r_biology_objectives.htm
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2. Cells and Organelles WS (should be done, but study for quiz) ... - What did Schleiden and Schwann conclude about cells? ... Cells and Organelles...
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carrington.dpscalendar.net/teacherpages/agarris/
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What did Matias Schleiden conclude about cells? ... c All plants are made of cells ... What did Theodor Schwann conclude about cells? → All animals are made of cells;
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