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n. The part of the embryonic mesoderm, consisting of loosely packed, unspecialized cells set in a gelatinous ground substance, from which connective tissue, bone, cartilage, and the circulatory and lymphatic systems develop.

n. That part of the mesoderm of an embryo that develops into connective tissue, bone, cartilage, etc.

n. The tissue or substance of the mesoderm of some animals, as sponges.

n. In embryology, the whole or a portion of the middle germ-layer, or mesoblast, when this layer is not epithelial, but consists of stellate, loosely interconnected, or even disconnected cells like those seen in primitive forms of connective tissue.

n. mesodermal tissue that forms connective tissue and blood and smooth muscles

"In recent years, however, pluripotent stem cells were discovered in various human tissues – in the spinal cord, in the brain, in the mesenchyme (connective tissue) of various organs, and in the blood of the umbilical cord."

mesoblast    mesoderm   

mesenchymal   

mesoderm    lymphopoietin    microenvironment    coactivation    distorter