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Pertaining to the mesoderm.
Farlex Partner Medical Dictionary © Farlex 2012


(mes'o-derm) [? + derma, skin]
A primary germ layer of the embryo lying between ectoderm and endoderm. From it arise all connective tissues; muscular, skeletal, circulatory, lymphatic, and urogenital systems; and the linings of the body cavities. See: ectoderm; endodermmesodermicmesodermal, adjective

axial mesoderm

Portion of the mesoderm that gives rise to the notochord and prechordal plate.

extraembryonic mesoderm

Mesoderm lying outside the embryo proper and involved in the formation of amnion, chorion, yolk sac, and body stalk.

intermediate mesoderm

Mesoderm lying between somite and lateral mesoderm, and giving rise to embryonic and definitive kidneys and their ducts.

lateral mesoderm

Unsegmented mesoderm lying lateral to the intermediate mesoderm. In it develops a cavity (coelom), separating it into layers (somatic and splanchnic mesoderm).
Synonym: hypomere

paraxial mesoderm

Mesoderm lying immediately lateral to the neural tube and notochord.

somatic mesoderm

The outer layer of the lateral mesoderm. It becomes intimately associated with the ectoderm, forming the somatopleure, from which the ventral and lateral walls of the embryo develop.

splanchnic mesoderm

The inner layer of the lateral mesoderm. It becomes intimately associated with the endoderm, forming the splanchnopleure, from which the gut and the lungs and their coverings arise.
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
Investigating the origins of triploblasty: "'mesodermal" gene expression in a diploblastic animal, the sea anemone Nematostella vectensis (phylum, Cnidaria: class, Anthozoa).
Anderson, "Malignant mixed mesodermal tumors: carcinoma, sarcoma, or both?" Human Pathology, vol.
Type II anomalies are ectodermal and mesodermal in origin and thus contain adnexal skin structures and cartilages.
Distinct mesodermal signals, including BMPs from the septum transversum mezenchyme are required in combination for hepatogenesis from the endoderm.
Therefore, they will contribute to producing a change in the epigenetic state [35] and create different patterns of transcriptional regulation [86, 87] that will allow the efficient differentiation of mesodermal and endodermal lineages.
In the cases described here, two rare associations of GS with CRS and encephalocele, both presumably resulting from failure of mesodermal cell migration during early blastogenesis, are reported.
Juvenile GCTs are exceedingly rare but can also be associated with mesodermal dysplastic syndromes characterized by the presence of enchondromatosis and hemangioma formation, such as Ollier disease or Maffucci syndrome.
Mesodermal (mullerian) adenosarcoma of the ovary: a clinicopathologic analysis of 40 cases and a review of the literature.
Upper urinary tract (UUT) benign tumours are rare and originate from mesodermal tissue of the ureteral wall; (1) its etiology is poorly understood.
Mature ectodermal tissues (br-ain, skin) are always component of Germ cell tumor, 90% of tumors may have mesodermal tissues (fat, mu-scles, cartilage, bone), and most have endodermal tis-sues (ciliated, bronchial epithelium gastrointestinal, mucinous, thyroid tissue).