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Stem cells

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(i) Stem cells are special types of cells present in the body of multicellular organisms.
(ii) These cells give rise to all other types of cells.
(iii) These cells play an important role in wound healing. All the stem cells are almost alike when they are in the form of a mass of cells during earliest stage of development.
(iv) During further development , stem cells undergo cell differentiation .
(v) Stem cells are present in umbilical cord, blastocyst stage of embryonic development, red bone marrow, adipose connective tissue.
(vi) It has become possible to produce different types of tissues and the degenerated part of any organ with the help of these stem cells.
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