The fertilized egg undergoes cell divisions that form a ball of cells during (A)__________.

During (B)__________, the endoderm, ectoderm, and mesoderm form. All the tissues of the adult body will come from these three germ layers.

Differentiation is the process where cells are assigned specific structures and functions.

(C)__________ is the stage where tissues form and become organized into organs.

The fertilized egg undergoes cell divisions that form a ball of cells during (A) embryogenesis or cleavage.

During (B) gastrulation, the three germ layers - endoderm, ectoderm, and mesoderm - form. These layers give rise to all the tissues of the adult body.

Differentiation is the process where cells become specialized and acquire specific structures and functions. It occurs during various stages of development.

(C) Organogenesis is the stage where tissues organize and form organs. This process involves the intricate development and arrangement of different cell types to create functioning organs.