The journey of a fertilized egg is illustrated as it travels from the fallopian tube to the uterus. Cell division is explained and the miracle of life is shown.

Learn how the needs of the fetus are met by the placenta, which is a special organ that belongs to both the mother and the fetus! Rishi is a pediatric infectious disease physician and works at Khan Academy. [12:29]

Learn how there are two distinct Bohr effects happening at the same time in the placenta. Rishi is a pediatric infectious disease physician and works at Khan Academy. [10:34]

Watch as fetal blood goes through umbilical vessels and takes a shortcut through the Ductus Venosus to make it back to the heart. Rishi is a pediatric infectious disease physician and works at Khan Academy. [12:43]

The explanation of how a fertilized egg develops once it has become a zygote. [19:54]

This lesson will give an overview of the structure and function of the placenta in the development of an embryo as well as discuss other important membranes and structures associated with development. It is 2 of 5 in the series titled...

A video exploring why every person even some animals have belly buttons. Understand that the belly buttons are left over from the umbilical cord that once connected a growing baby inside its mother to its mother for food and oxygen. [2:56]