Skip Navigation

Little One Pregnancy Place  

Image Gallery

Tube-Shaped Heart

3 weeks
From The Biology of Prenatal Development.Buy Now

Note:

My simple tube-shaped heart doesn't stay this way very long. I am changing so fast in so many places that I need my heart to start working as soon as possible!

Label Key:

  • 1. blood will leave here
  • 2. blood will enter here

All ages referenced to fertilization, not last menstrual period.
Hide Labels | Larger
Tube-Shaped Heart
Tube-Shaped Heart
( 3 weeks)
Three-Week Embryo
Three-Week Embryo
( 3 weeks)
The Folding of the Embryo
The Folding of the Embryo
( 3 weeks, 3 days)
Heart Chambers and Liver
Heart Chambers and Liver
( 4 weeks, 4 days)
Heart in Slow Motion
Heart in Slow Motion
( 4 weeks, 4 days)
The Early Brain and Face
The Early Brain and Face
( 4 weeks, 6 days)
Previous Set Previous Picture Next Set Next Picture
Help give babies a healthy start and a healthy future. Donate now.
Tell your story. Create your own pregnancy calendar.