64-Cell Stage (4 days)

At the 64 cell stage, the embryo reaches the morula stage. At this point, the center of the morula begins to fill with fluid from the uterine cavity. As the space within develops, two distinct types of cells will form. The outer wall will develop trophoblasts and the inner cells will develop embryoblasts.

 

Anatomy Explorer

Instructions:

Zoom in/out: Click +/-

Move up/down/left/right: Click compass arrows

Rotate image: Click and drag in any direction, anywhere in the frame

Identify objects: Click on them in the image

2D Interactive3D Rotate & Zoom
Change Anatomical System
Change View Angle