Skip Navigation

Movie Theater

Human Development


 

7 days

Buy NowFrom The Biology of Prenatal Development.

Script: Biologically speaking, "human development begins at fertilization," when a woman and a man each combine 23 of their own chromosomes through the union of their reproductive cells.

All ages referenced to fertilization, not last menstrual period.
 <  Previous  See Snapshots  Next  > 
Log in to create a playlist
Human Development
Human Development
Heart and Circulatory System
Heart and Circulatory System
The Folding of the Embryo
The Folding of the Embryo
The Folding of the Embryo
The Folding of the Embryo
Heart Development
Heart Development
The Embryo and Yolk Sac
The Embryo and Yolk Sac
Previous Set Previous Movie Next Set Next Movie
Free resources and training for educators
Buy the Biology of Prenatal Development DVD


Add a Comment

Your Name: Log In 3rd-party login: Facebook     Google     Yahoo

Comment: