* Cleavage is the process of rapid cell division that occurs right after fertilization. The fertilized egg, or zygote, undergoes multiple rounds of division without significant growth. This results in a ball of cells called a morula. Cleavage is essentially the first phase of embryonic development.
* Embryo refers to the developing organism from the moment of implantation (when the morula attaches to the uterine wall) until the eighth week of gestation. This period encompasses all the major organ systems forming, and the embryo begins to look more like a recognizable human.
So, cleavage is a process (cell division) that happens within the embryo (the developing organism).
Here's an analogy: Imagine building a house. Cleavage would be like laying the foundation – the initial building blocks. The embryo would be the entire house, including the foundation, walls, roof, etc., as it takes shape.
