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The Endowment for Human Development
The Endowment for Human Development
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Slideshow: The Heart

The Folding Heart

#32, Slide 2 of 34

3 weeks, 5 days

From The Biology of Prenatal Development.Buy Now

Note:

Heart chambers begin developing quickly! It makes sense because the rapidly growing embryo requires a rapidly expanding circulatory system to survive and thrive.

Note:

The conotruncus represents the outflow tract of the heart. As development proceeds, the inflow end of the heart will become situated closer to the head as seen in the fetus, newborn, and adult.

Label Key:

1. right ventricle
2. conotruncus
3. left ventricle
4. atrio-ventricular canal (will receive incoming blood from the atria)
All ages referenced to fertilization, not last menstrual period.
Heart ChambersThe Folding HeartThe Folding of the EmbryoFour-Week EmbryoThe Body Plan EmergesThe Heart in MotionHeart Chambers and LiverHeart in Slow MotionSurrounded by the AmnionHeart and LiverHead and HeartHeart and BrainHead and HeartLiver, Cord, and Left Foot PlateClose-up of Heart and LiverHeart and LiverThe Heart and LiverThe Vital OrgansHand Plate and Vital OrgansLeft Hand Plate and WristThe HeartThe Brain, Heart, and LiverThe Hand in MotionThe Face and TrunkLeft Hand and Vital OrgansThe Beating Heart and LiverThe Liver and Beating HeartThe Heart and BrainThe Four-Chambered HeartThe Hand, Chest, and LiverThe Heart and HandThe Beating HeartThe Heart and ChestClose-up, Seven-Week Heart
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