{"id":7451,"date":"2019-05-22T15:57:01","date_gmt":"2019-05-22T15:57:01","guid":{"rendered":"http:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/cell_theory\/"},"modified":"2019-05-22T15:57:01","modified_gmt":"2019-05-22T15:57:01","slug":"cell_theory","status":"publish","type":"post","link":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/cell_theory\/","title":{"rendered":"Cell theory"},"content":{"rendered":"<p>In its modern form, the theory that all cells come from previously existing cells and that they are the fundamental functional units of all living organisms. &nbsp;Considered to be one of the most important theories in biology, it was originally proposed by <a href=\"http:\/\/neuroportraits.eu\/portrait\/matthias-schleiden\" data-editable-link=\"http:\/\/neuroportraits.eu\/portrait\/matthias-schleiden&amp;target=_self\" target=\"_self\" rel=\"noopener noreferrer\">Matthias Schleiden<\/a> (1804-1881) in 1838 and again the following year by <a href=\"http:\/\/www.bookrags.com\/biography\/theodor-schwann\/\" data-editable-link=\"http:\/\/www.bookrags.com\/biography\/theodor-schwann\/&amp;target=_self\" target=\"_self\" rel=\"noopener noreferrer\">Theodor Schwann<\/a> (1810-1882), it became known as the Schleiden-Schwann cell theory. Their theory proved to be untenable, largely because they claimed that cell generation started with a process of &#8216;crystallisation&#8217; within the intracellular substance followed by progressive enlargement, a claim refuted by others such as <a href=\"http:\/\/www.biography.com\/people\/rudolf-virchow-9519219?page=1\" data-editable-link=\"http:\/\/www.biography.com\/people\/rudolf-virchow-9519219?page=1?target=_self\" target=\"_self\" rel=\"noopener noreferrer\">Rudolf Virchow<\/a> (1821-1905) who pointed out that every cell comes from a pre-existing cell. &nbsp;Subsequently, there were problems in extending cell theory to nerve cells because at the time they were difficult to reconstruct. &nbsp;However, this was eventually achieved with the appearance of the neuron doctrine.<\/p>\n<p>See <a href=\"axon\">Axon<\/a>, <a href=\"cell\">Cell<\/a>, <a href=\"neuron\">Neuron<\/a>, <a href=\"neuron_doctrine\">Neuron doctrine<\/a>, <a href=\"progenitor_cells\">Progenitor cells<\/a>, <a href=\"proliferative_cells\">Proliferative cells<\/a>, Stem cells<\/p>\n<p><\/body><\/html><\/p>\n","protected":false},"excerpt":{"rendered":"<p>In its modern form, the theory that all cells come from previously existing cells and that they are the fundamental functional units of all living organisms. &nbsp;Considered to be one of the most important theories in biology, it was originally proposed by Matthias Schleiden (1804-1881) in 1838 and again the following year by Theodor Schwann &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/cell_theory\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Cell theory&#8221;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[2],"class_list":["post-7451","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-glossary","entry"],"_links":{"self":[{"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/posts\/7451","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/comments?post=7451"}],"version-history":[{"count":0,"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/posts\/7451\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/media?parent=7451"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/categories?post=7451"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lancaster.ac.uk\/fas\/psych\/glossary\/wp-json\/wp\/v2\/tags?post=7451"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}