April 29, 2013?
Convergent extension
Triploblastic
Sea Urchin ~1000 cells
Sea Urchin
Sea Urchin Vade mecum …Movies
Sea Urchin
Sea Urchin Primary mesenchyme is also called skeletogenic mesenchyme
Sea Urchin Receptors?
Sea Urchin Vade mecum …Movies
Sea Urchin
Sea Urchin – first stage of archenteron formation
Sea Urchin ~1000 cells
Sea Urchin – second stage of archenteron formation Convergent extension
Sea Urchin – third stage of archenteron formation
Sea Urchin BMP-2/ BMP-4 Nodal
Sea Urchin ~1000 cells
Sea Urchin
Sea Urchin
Sea Urchin
Sea Urchin Skeletogenic micromeres: Beta Catenin (only autonomous cells)
Figure 8.12(1) The Role of b-catenin in Specifying the Vegetal Cells of the Sea Urchin Embryo Figures\Chapter08\DevBio7e08121.jpg
Disheveled expression in early Sea Urchin Embryos (maternal, autonomous) Figures\Chapter08\DevBio7e08080.jpg
Figure 8.12(2) The Role of b-catenin in Specifying the Vegetal Cells of the Sea Urchin Embryo LiCl treatment (probably block of GSK-3 activ.) Figures\Chapter08\DevBio7e08122.jpg
Figure 8.12(3) The Role of b-catenin in Specifying the Vegetal Cells of the Sea Urchin Embryo Figures\Chapter08\DevBio7e08123.jpg
Figure 8.13 The Micromere Regulatory Network Proposed by Davidson and Colleagues (2002) Figures\Chapter08\DevBio7e08130.jpg
Figure 8.14(1) A Model of Endoderm Specification Figures\Chapter08\DevBio7e08141.jpg
Sea Urchin ~1000 cells Blastocoel Archenteron
Amphibian
Amphibian
Amphibian
Amphibian earlyZfish| http://www.youtube.com/watch?v=moL5C8SjeJU http://www.youtube.com/watch?v=QXiFM2U1YFw frog: http://www.youtube.com/watch?v=8v6cXkzlEQA Frog gastrul/neurul: http://www.youtube.com/watch?v=qisrNX3QjUg&NR=1 Frog Inner Gast: http://www.youtube.com/watch?v=WSouNeWnZ_0 urchin longer: http://www.youtube.com/watch?v=AD4t5ijilYM&NR=1
Amphibian
Amphibian
Amphibian
Amphibian Vade Mecum
Amphibian
Amphibian
Amphibian
Amphibian
Amphibian
Figure 12.8(1) Movements of Cells During Secondary Neurulation in Xenopus Figures\Chapter12\DevBio7e12081.jpg
Figure 12.8(2) Movements of Cells During Secondary Neurulation in Xenopus Figures\Chapter12\DevBio7e12082.jpg
Amphibian
Amphibian