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[meso- + Gr. derma, skin]
A primary germ layer of the embryo lying between the ectoderm and the endoderm. From it arise all connective tissues; muscular, skeletal, circulatory, lymphatic, and urogenital systems; and the linings of the body cavities.
SYN: SEE: mesoblast
SEE: ectoderm; SEE: endoderm
mesodermicmesodermal (mes″ŏ-dĕr′mik) (mez″ŏ-dĕr′mik) (mes″ŏ-dĕr′măl) (mez″ŏ-dĕr′măl), adj.