Echinoderm Development. Part 2: Gastrulation

Synopsis: Shows gastrulation from the initial invagination to completion in the embryo of the sand dollar ‘Dendraster excentricus’. First shows the free swimming blastula. Primary mesenchyme cells dissociate from the vegetal plate moving to the blastocoel. The smooth inward movement of the archenteron coincides with rapid movements of the epithelial cells. The cells at the tip of the archenteron elongate to establish contact with the wall. They appear to pull the archenteron to the dorsal wall of the embryo. Two coelomic pouches appear near the tip of the archenteron, which pinch off to become coelomic sacs, developing into the coelom and water vascular system. The tip of the archenteron fuses with the stomodaeum and forms the mouth of the embryo. The gut tube rounds centrally to form the stomach. The entire process viewed takes about ten hours.
Series: Developmental Biology Film Program, Series
Language: English
Country: United States
Medium: Film; Film. 16mm. st. col. 5 min.
Technical information: Black-and-white / Sound
Year of production: 1972
Availability: Hire
Documentation: Notes supplied.
Uses: Developmental courses in biology and zoology.*
Subjects: Biology
Keywords: developmental biology; echinoderms; embryonal development; gastrulation; marine animals; sand dollars

Name: Higher Education Film & Video Library
Email: services@bufvc.ac.uk
Web: http://bufvc.ac. External site opens in new window
Phone: 020 7393 1503
Fax: 020 7393 1555
Address: c/o British Universities Film & Video Council
77 Wells Street
London
W1T 3QJ
Notes: Catalogue available from British Universities Film & Video Council.

This record has been viewed 348 times.

British Universities Film & Video Council