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Explore neural tube and crest, intra-embryonic mesoderm, and coelome development. Learn about somite period, molecular controls, and timeline of key events. Ideal for mastering general embryology concepts.
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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