Blastula

Blastula explained in an easy to understand way:

Imagine trying to organize a large group of people into a circle for a group photo. This is similar to the formation of a blastula, where cells organize themselves into a hollow ball in an embryo. Just like people find their place in a circle to ensure everyone is visible and included, cells in a blastula arrange themselves into a spherical shape, setting the stage for further organization and specialization, much like the transition into a gastrula where specific roles and positions are defined.