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Mesenchyme (/ ˈmɛsənkaɪm ˈmiːzən -/ [1]) is a type of loosely organized animal embryonic connective tissue of undifferentiated cells that give rise to most tissues, such as skin, blood or bone. [2][3] The interactions between mesenchyme and epithelium help to form nearly every organ in the developing embryo. [4]
Flatworms. Parenchyma is the tissue made up of cells and intercellular spaces that fills the interior of the body of a flatworm, which is an acoelomate. This is a spongy tissue also known as a mesenchymal tissue, in which several types of cells are lodged in their extracellular matrices. The parenchymal cells include myocytes, and many types of ...
They are cells that support the function of the parenchymal cells of that organ. The most common stromal cells include fibroblasts and pericytes. The term stromal comes from Latin stromat-, "bed covering", and Ancient Greek στρῶμα, strôma, "bed". Stromal cells are an important part of the body's immune response and modulate inflammation ...
Mesenchymal stem cells (MSCs), a term first named (1991) by Arnold I. Caplan at Case Western Reserve University, [5] are characterized morphologically by a small cell body with a few cell processes that are long and thin. While the terms mesenchymal stem cell (MSC) and marrow stromal cell have been used interchangeably for many years, neither ...
Cells derived from ectoderm. Toggle Cells derived from ectoderm subsection. Cells derived from mesoderm. Toggle Cells derived from mesoderm subsection. Paraxial mesoderm. Intermediate mesoderm. Lateral plate mesoderm. Cells derived from endoderm. Toggle Cells derived from endoderm subsection.
Parenchyma is a versatile ground tissue that generally constitutes the "filler" tissue in soft parts of plants. It forms, among other things, the cortex (outer region) and pith (central region) of stems, the cortex of roots, the mesophyll of leaves, the pulp of fruits, and the endosperm of seeds.
The face and neck development of the human embryo refers to the development of the structures from the third to eighth week that give rise to the future head and neck.They consist of three layers, the ectoderm, mesoderm and endoderm, which form the mesenchyme (derived form the lateral plate mesoderm and paraxial mesoderm), neural crest and neural placodes (from the ectoderm). [1]
The epithelial–mesenchymal transition (EMT) is a process by which epithelial cells lose their cell polarity and cell–cell adhesion, and gain migratory and invasive properties to become mesenchymal stem cells; these are multipotent stromal cells that can differentiate into a variety of cell types. EMT is essential for numerous developmental ...