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GENERAL EMBRYOLOGY. NEURULATION INTRA EMBRYONIC MESODERM. Learning objectives. To learn about neural tube formation and derivatives. ….neural crest derivatives ….sub divisions of intra embryonic mesoderm ….intra embryonic coelome formation ….derivatives of paraxial mesoderm
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GENERAL EMBRYOLOGY NEURULATION INTRA EMBRYONIC MESODERM
Learning objectives • To learn about neural tube formation and derivatives. • ….neural crest derivatives • ….sub divisions of intra embryonic mesoderm • ….intra embryonic coelome formation • ….derivatives of paraxial mesoderm • ….somite period and parts of somite • ….derivatives of IEM
Q. Short essays • Neurulation • Neural crest • Intra embryonic mesoderm • Intra embryonic coelome • Somites • Somite period
Q. Short answers • Somitomeres • Occipital somites • Somite period • Lateral plate mesoderm • Neural plate • Paraxial mesoderm • Derivatives of neural crest
Timeline of events • Notochord 17 days • Intra embryonic mesoderm 19 days • Neural tube 21 days • Appearance of somites 20 days • End of somites 30 days
Somites(44) - regionwise • Occipital – 4 • Cervical – 8 • Thoracic – 12 • Lumbar – 5 • Sacral – 5 • Coccygygeal – 8 to 10