Skip Navigation
The Endowment for Human Development
The Endowment for Human Development
Improving lifelong health one pregnancy at a time.
Donate Now Get Free Videos

Movie Theater

Main Stem Bronchi


9 weeks

From The Biology of Prenatal Development.Buy Now

Script: 9周

呼吸系统中, 出现右和左主支气管干 并且最终 连结气管 和肺。

All ages referenced to fertilization, not last menstrual period.
See Snapshots   |   Log in to create a playlist
4D Ultrasound
4D Ultrasound
The Fetal Period
The Fetal Period
Main Stem Bronchi
Main Stem Bronchi
Uterus is Identifiable
Uterus is Identifiable
Vocal Cords
Vocal Cords
Sucking and Swallowing
Sucking and Swallowing
When does health begin? Find out now.
Free resources and training for educators


Add a Comment

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

Comment: