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what are germ layer ?

Asked by निकोदिमुस 6th July 2017, 7:57 PM
Answered by Expert
Answer:
  • Germ layer is a layer of cell which forms during early embryogenesis.
  • During gastrulation, a stage in embryogenesis or embryonic development, the hollow ball of cells called blastula arranges itself into the layer of cells which is a germ layer.
  • At the end of gastrulation three germs layers are formed: an outer ectoderm, middle mesoderm and inner endoderm.
  • Each germ layer differentiates and gives rise to different systems of the body.
  • For example, ectoderm develops into the central nervous system, peripheral nervous system, eyes, ears, epidermis, nose
  • Mesoderm gives rise to muscles, bones, cartilage, kidneys, gonads.
  • Endoderm gives rise to lining of internal organs, pancreas, liver, urinary bladder
Answered by Expert 7th July 2017, 10:17 AM
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