Sea Urchin Embryology Back to Contents page

 

 

 

[ANIMATIONS][PATH]

GASTRULATION IN SEA URCHINS

CROSS SECTIONAL VIEW: Yellow is ectoderm, orange is endoderm, red is primary mesenchyme cells and skeleton, orange "dots" are secondary mesenchyme cells. Process from "blastula" to "pluteus" takes about 48 hours.

Note: Anus is formed before the mouth.

Windows: Right click on animation and choose save to file

Macintosh: Hold click on animation and choose save to file

© 2000 Chris Patton
Stanford University