The Sticklebacks Eggs

An educational film a movie through a microscope in two parts Within minutes after the egg drops in the water fertilization occurs and contractions start Soon in a fertilized egg we see the germinal disc divide into two blastomeres Divisions continue contractions reoccur at the cap as it covers the egg Title cards in French tell us what to watch for Muscular movements and circulation appear the heart beats In part two we see blood circulation begin as red cells develop on the surface of the yoke They mass toward the heart Arteries form blood flows The egg hatches and blood flows to new areas