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mesoderm

[mez-uh-durm, mes-, mee-zuh-, -suh-] /ˈmɛz əˌdɜrm, ˈmɛs-, ˈmi zə-, -sə-/
noun, Embryology
1.
the middle germ layer of a metazoan embryo.
Origin
1870-1875
1870-75; meso- + -derm
Related forms
mesodermal, mesodermic, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for mesoderm
  • It was an inducer of mesoderm and axial development.
  • Thus continuous cores of mesoderm form the axes of the limb-buds and a continuous column of mesoderm the future vertebral column.
  • As the cells multiply they extend into the subjacent mesoderm, and thus form a ridge or strand of cells imbedded in mesoderm.
  • The entoderm which lines these pouches grows in the form of a number of solid buds into the surrounding mesoderm.
  • Both the cross-striated and smooth muscles, with the exception of a few that are of ectodermal origin, arise from the mesoderm.
  • By the upward growth of the mesoderm the neural tube is ultimately separated from the overlying ectoderm.
  • Later the mesoderm again penetrates between the entoderm and the ectoderm.
  • The mesoderm around the tubules becomes condensed to form the connective tissue of the kidney.
  • mesoderm allows for the development of these organs, and true muscle.
British Dictionary definitions for mesoderm

mesoderm

/ˈmɛsəʊˌdɜːm/
noun
1.
the middle germ layer of an animal embryo, giving rise to muscle, blood, bone, connective tissue, etc See also ectoderm, endoderm
Derived Forms
mesodermal, mesodermic, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for mesoderm
n.

1858, from French mésoderme or German Mesoderm, literally "middle skin," coined by German physician Robert Remak (1815-1865) from meso- + Greek derma (see -derm).

Online Etymology Dictionary, © 2010 Douglas Harper
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mesoderm in Medicine

mesoderm mes·o·derm (měz'ə-dûrm', měs'-)
n.
The middle embryonic germ layer, lying between the ectoderm and the endoderm, from which connective tissue, muscle, bone, and the urogenital and circulatory systems develop.


mes'o·der'mic adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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mesoderm in Science
mesoderm
  (měz'ə-dûrm')   
The middle of the three primary germ layers of the embryos of vertebrates and other complex animals. In vertebrates, the mesoderm gives rise to the muscles, bones, cartilage, connective tissue, blood, blood and lymph vessels, dermis, kidneys, and gonads. The mesoderm develops during gastrulation from either the ectoderm or the endoderm. The embryos of simpler animals lack a mesoderm. Compare ectoderm, endoderm.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Article for mesoderm

the middle of the three germ layers, or masses of cells (lying between the ectoderm and endoderm), which appears early in the development of an animal embryo. In vertebrates it subsequently gives rise to muscle, connective tissue, cartilage, bone, notochord, blood, bone marrow, lymphoid tissue, and to the epithelia (surface, or lining, tissues) of blood vessels, lymphatic vessels, body cavities, kidneys, ureters, gonads (sex organs), genital ducts, adrenal cortex, and certain other tissues. See also ectoderm; endoderm

Learn more about mesoderm with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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