mesoderm


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mesoderm

 [mez´o-derm]
the middle of the three primary germ layers of the embryo, lying between the ectoderm and entoderm; from it are derived the connective tissue, bone, cartilage, muscle, blood and blood vessels, lymphatics, lymphoid organs, notochord, pleura, pericardium, peritoneum, kidneys, and gonads. adj., adj mesoder´mal, mesoder´mic.
somatic mesoderm the outer layer of the developing mesoderm.
splanchnic mesoderm the inner layer of the developing mesoderm.

mes·o·derm

(mez'ō-derm),
The middle of the three primary germ layers of the embryo (the others being ectoderm and endoderm); mesoderm is the origin of connective tissues, myoblasts, blood, the cardiovascular and lymphatic systems, most of the urogenital system, and the lining of the pericardial, pleural, and peritoneal cavities.
[meso- + G. derma, skin]

mesoderm

/meso·derm/ (mez´o-derm) the middle of the three primary germ layers of the embryo, lying between the ectoderm and endoderm; from it are derived the connective tissue, bone, cartilage, muscle, blood and blood vessels, lymphatics, lymphoid organs, notochord, pleura, pericardium, peritoneum, kidneys, and gonads.mesoder´malmesoder´mic

mesoderm

(mĕz′ə-dûrm′, mĕs′-)
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′mal, mes′o·der′mic adj.

mesoderm

[mes′ōdurm]
Etymology: Gk, mesos + derma, skin
(in embryology) the middle of the three cell layers of the developing embryo. It lies between the ectoderm and the endoderm. Bone, connective tissue, muscle, blood, vascular and lymphatic tissue, and the pleurae of the pericardium and peritoneum are all derived from the mesoderm.

mes·o·derm

(mez'ō-dĕrm)
The middle of the three primary germ layers of the embryo (the others being ectoderm and endoderm); mesoderm is the origin of all connective tissues, all musculature, blood, cardiovascular and lymphatic systems, most of the urogenital system, and the lining of the pericardial, pleural, and peritoneal cavities.
Synonym(s): mesoblast.
[G. meso- middle + G. derma, skin]

mesoderm

The intermediate of the three primary germ layers of the developing embryo, lying between the outer ECTODERM and the inner ENDODERM. Mesoderm develops into the bones and muscles, the heart and blood vessels and most of the reproductive system.

mesoderm

the layer of embryonic cells lying between ECTODERM and ENDODERM in all higher animals (all METAZOA except COELENTERATES) giving rise to muscle, the blood system, connective tissues, the kidney, the dermis of the skin and the axial skeleton. The mesoderm is often split into two layers with the COELOM in between.

mesoderm

middle of the three embryonic primary germ layers; gives origin to all connective tissues

mesoderm

One of the three primary germinal layers of an embryo from which the eye is derived. It eventually forms the extraocular muscles and the orbital and ocular vasculature. See ectoderm.

mes·o·derm

(mez'ō-dĕrm)
Middle of three primary germ layers of embryo (the others being ectoderm and endoderm).
[G. meso- middle + G. derma, skin]

mesoderm,

n the middle of the three cell layers of the developing embryo. It lies between the ectoderm and the endoderm. Bone, connective tissue, muscle, blood, vascular and lymphatic tissue, and the pleurae of the pericardium and peritoneum are all derived from the mesoderm.

mesoderm

the middle of the three primary germ layers of the embryo, lying between the ectoderm and entoderm; from it are derived the connective tissue, bone, cartilage, muscle, blood and blood vessels, lymphatics, lymphoid organs, notochord, pleura, pericardium, peritoneum, kidneys and gonads.

extraembryonic mesoderm
located outside the developing embryo and forming its accessory organs.
paraxial mesoderm
adjacent to the mid line beneath the epiblast of the embryo which develop into somites.
somatic mesoderm
the outer layer of the developing mesoderm.
splanchnic mesoderm
the inner layer of the developing mesoderm.
References in periodicals archive ?
It has been shown that Wnt13 expressed from the cardiogenic mesoderm in mice and the frizzled-related protein 5, which acts as a Wnt inhibitor, regulate the development of liver primordium along with mutually stimulating and repressive effects (15).
A guide to the pathologies that develop at different embryological stages Gastrulation Primary neurulation Split cord Spinal lipoma--premature malformation--duplicated dysjunction and mesoderm notochord migration Neurenteric cysts--failure Dermal sinus track--late of notochord precursor dysjunction integration Gastrulation Secondary neurulation Split cord Thick filum--failure of malformation--duplicated terminal mass regression (Fig.
Behind the back end of the digestive tract (the anal opening), along the bottom of the tail, the two mesoderm layers come together as the body wall closes up, forming a single (median) fin.
We observed a shift in germ layer allocation with an increase in endoderm plus mesoderm at the expense of ectoderm, and corresponding changes in cell lineage.
Y blastoderm fydd yn y pendraw maes o law yn datblygu i roi'r ectoderm neu'r echgroen, yr endoderm a'r mesoderm.
These differentiated cells were immunohistochemically stained with primary antibodies against the antigens specific for different germ layers (a-fetoprotein (1:100) (AFP) for endoderm cells, [alpha]-actin (1:100) for mesoderm cells, Nestin (1:100), [beta]-Tubulin III (1:100) and GFAP (1:100) for ectoderm cells) (all antibodies purchased from Chemicon Co.
These seven new cell lines have markers of diverse mesoderm and neural crest cell types and are designated W11, Z2, SK31, SM35, T36, EN51 and EN55.
2) Poor interaction between mesoderm and ectoderm may also prevent fusion.
The mesoderm accounts for approximately 75% of the body's mass but only for about 1% of tumours in the adult population.
8 In the present case, no neurofibroma was found anterior to C2, and since it is a widely accepted fact that in neurofibromatosis there is genetically related maldevelopment of neuroectoderm and mesoderm, there may be associated deformities in the adjacent structures and ligaments--in turn leading to AAD.
Students use dowels to roll out sheets of blue ectoderm to represent skin and red mesoderm to represent somites, as well as rolling long cylinders representing spinal cord (green neural ectoderm), notochord (red mesoderm), and gut (yellow endoderm).
The whole organism is composed of three principal layers of tissue: the endoderm, the ectoderm, and the mesoderm.