Mesenchyme, or mesenchymal connective tissue, is a type of undifferentiated loose connective tissue that is derived mostly from mesoderm, although some are derived from other germ layers
In animal tissue, stroma (from Greek στρῶμα, meaning “bed, bed covering”) refers to the connective, supportive framework of a biological cell, tissue, or organ.
The parenchyma are the functional parts of an organ in the body. This is in contrast to the stroma, which refers to the structural tissue of organs, namely, the connective tissues.
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